5.1"min 50 galpeacefulModerate
Set a tank to check fit
Compatibility engine
Add livestock
Every species is checked against your display tank before it goes in the water.
How this works →276 of 276 species · no tank set
Puffer
Valentini Puffer
Canthigaster valentini
3.9"min 30 galsemi-aggressiveEasy
Set a tank to check fit
Shrimp
Skunk Cleaner Shrimp
Lysmata amboinensis
2.2"min 20 galpeacefulShrimp · cleans fishBeginner
Cleans other fish.
Controls fish parasites (ich)
Set a tank to check fit
Urchin
Tuxedo Urchin
Mespilia globulus
2"min 30 galpeacefulUrchin · grazes algaeEasy
Controls film & diatoms, hair algae
Set a tank to check fit
Wrasse
Radiant Wrasse
Halichoeres iridis
4.5"min 60 galpeacefulExpert
Controls bristleworms
Set a tank to check fit
Frogfish
Painted Frogfish
Antennarius pictus
11.8"min 40 galsemi-aggressiveModerate
Set a tank to check fit
Butterflyfish
Copperband Butterflyfish
Chelmon rostratus
7.9"min 75 galpeacefulExpert
Controls aiptasia
Set a tank to check fit
Dragonet
Mandarin Dragonet
Synchiropus splendidus
2.8"min 30 galpeacefulExpert
Set a tank to check fit
Filefish
Matted Filefish
Acreichthys tomentosus
4.7"min 30 galpeacefulModerate
Controls aiptasia
Set a tank to check fit
Firefish
Helfrich's Firefish
Nemateleotris helfrichi
2.4"min 20 galpeacefulModerate
Set a tank to check fit
Moorish idol
Moorish Idol
Zanclus cornutus
9.1"min 125 galpeacefulExpert
Set a tank to check fit
Sweetlips
Harlequin Sweetlips
Plectorhinchus chaetodonoides
23.6"min 500 galpeacefulExpert
Set a tank to check fit
Pipefish
Dragonface Pipefish
Corythoichthys haematopterus
7.1"min 30 galpeacefulExpert
Set a tank to check fit
Jawfish
Pearly Jawfish
Opistognathus aurifrons
3.9"min 30 galpeacefulModerate
Set a tank to check fit
Hermit crab
Blue-Leg Hermit Crab
Clibanarius tricolor
1"min 10 galpeacefulHermit crab · grazes algaeBeginner
Controls film & diatoms, detritus & leftover food
Set a tank to check fit
Crab
Emerald Crab
Mithraculus sculptus
1.6"min 20 galpeacefulCrab · grazes algaeEasy
Controls bubble algae (valonia)
Set a tank to check fit
Goby
Yasha Goby
Stonogobiops yasha
2"min 10 galpeacefulModerate
Pairs with a pistol shrimp.
Set a tank to check fit
Tang
Yellow Tang
Zebrasoma flavescens
7.9"min 100 galsemi-aggressiveEasy
Controls hair algae
Set a tank to check fit
Conch
Fighting Conch
Strombus alatus
4"min 20 galpeacefulSnail · grazes algaeModerate
Controls detritus & leftover food, film & diatoms, cyanobacteria, sand-bed detritus
Set a tank to check fit
Moray
Snowflake Moray
Echidna nebulosa
35.4"min 90 galsemi-aggressiveModerate
Set a tank to check fit
Snail
Trochus Snail
Rochia nilotica
1.5"min 10 galpeacefulSnail · grazes algaeBeginner
Controls film & diatoms, cyanobacteria
Set a tank to check fit
Wormfish
Curious Wormfish
Gunnellichthys curiosus
4.7"min 30 galpeacefulExpert
Set a tank to check fit
Hawkfish
Coral Hawkfish
Cirrhitichthys oxycephalus
3.9"min 30 galaggressiveEasy
Set a tank to check fit
Cardinalfish
Banggai Cardinalfish
Pterapogon kauderni
3.1"min 30 galpeacefulEasy
Set a tank to check fit
Nudibranch
Berghia Nudibranch
Berghia stephanieae
1"min 5.0 galpeacefulSea slugModerate
Controls aiptasia
Set a tank to check fit
Rabbitfish
Foxface Rabbitfish
Siganus vulpinus
8.7"min 125 galpeacefulModerate
Controls hair algae
Set a tank to check fit
Squirrelfish
Crown Squirrelfish
Sargocentron diadema
6.7"min 75 galpeacefulEasy
Set a tank to check fit
Anthias
Purple Queen Anthias
Pseudanthias tuka
4.7"min 79 galpeacefulExpert
Set a tank to check fit
Dottyback
Orchid Dottyback
Pseudochromis fridmani
2.8"min 30 galpeacefulEasy
Controls bristleworms
Set a tank to check fit
Sea slug
Sea Hare
Aplysia dactylomela
7.9"min 30 galpeacefulSea slug · grazes algaeExpert
Controls hair algae
Set a tank to check fit
Sea star
Banded Serpent Star
Ophiolepis superba
7.9"min 30 galpeacefulStarfish · scavenges detritusModerate
Controls detritus & leftover food
Set a tank to check fit
Seahorse
Spotted Seahorse
Hippocampus kuda
6"min 30 galpeacefulExpert
Set a tank to check fit
Triggerfish
Picasso Triggerfish
Rhinecanthus aculeatus
11"min 180 galaggressiveModerate
Set a tank to check fit
Angelfish
Flame Angelfish
Centropyge loriculus
3.9"min 70 galsemi-aggressiveModerate
Set a tank to check fit
Soapfish
Six-Line Soapfish
Grammistes sexlineatus
11.8"min 180 galsemi-aggressiveExpert
Set a tank to check fit
Lionfish
Antennata Lionfish
Pterois antennata
7.9"min 50 galsemi-aggressiveModerate
Set a tank to check fit
Basslet
Blackcap Basslet
Gramma melacara
3.9"min 30 galpeacefulModerate
Set a tank to check fit
Batfish
Orbiculate Batfish
Platax orbicularis
23.6"min 360 galpeacefulModerate
Set a tank to check fit
Sea cucumber
Tiger Tail Sea Cucumber
Holothuria hilla
15.7"min 50 galpeacefulSea cucumber · grazes algaeExpert
Controls sand-bed detritus, detritus & leftover food
Set a tank to check fit
Clownfish
Percula Clownfish
Amphiprion percula
3.1"min 30 galpeacefulBeginner
Hosts an anemone.
Set a tank to check fit
Boxfish
Yellow Boxfish
Ostracion cubicus
17.7"min 250 galpeacefulExpert
Set a tank to check fit
Goatfish
Yellow Goatfish
Parupeneus cyclostomus
19.7"min 180 galpeacefulExpert
Set a tank to check fit
Dartfish
Scissortail Dartfish
Ptereleotris evides
5.5"min 30 galpeacefulEasy
Set a tank to check fit
Grouper
Miniata Grouper
Cephalopholis miniata
14.2"min 180 galaggressiveModerate
Set a tank to check fit
Blenny
Tailspot Blenny
Ecsenius stigmatura
2.4"min 10 galpeacefulEasy
Controls film & diatoms
Set a tank to check fit
Damsel
Green Chromis
Chromis viridis
3.1"min 30 galpeacefulEasy
Set a tank to check fit
Gramma
Royal Gramma
Gramma loreto
3.1"min 30 galpeacefulBeginner
Set a tank to check fit
Tilefish
Flashing Tilefish
Hoplolatilus chlupatyi
5.1"min 50 galpeacefulModerate
Set a tank to check fit
Puffer
Blue-Spotted Toby
Canthigaster solandri
4.7"min 50 galsemi-aggressiveModerate
Set a tank to check fit
Shrimp
Fire Shrimp
Lysmata debelius
2"min 10 galpeacefulShrimp · cleans fishEasy
Cleans other fish.
Controls fish parasites (ich)
Set a tank to check fit
Urchin
Pincushion Urchin
Lytechinus variegatus
4.3"min 30 galpeacefulUrchin · grazes algaeEasy
Controls hair algae, film & diatoms
Set a tank to check fit
Wrasse
McCosker's Flasher Wrasse
Paracheilinus mccoskeri
3.1"min 55 galpeacefulEasy
Set a tank to check fit
Butterflyfish
Yellow Longnose Butterflyfish
Forcipiger flavissimus
8.7"min 75 galpeacefulModerate
Set a tank to check fit
Dragonet
Scooter Blenny
Neosynchiropus ocellatus
3.5"min 30 galpeacefulExpert
Set a tank to check fit
Filefish
Fantail Filefish
Pervagor spilosoma
7.1"min 55 galpeacefulEasy
Set a tank to check fit
Firefish
Purple Firefish
Nemateleotris decora
3.1"min 20 galpeacefulEasy
Set a tank to check fit
Pipefish
Bluestripe Pipefish
Doryrhamphus excisus
2.8"min 30 galpeacefulExpert
Set a tank to check fit
Jawfish
Dusky Jawfish
Opistognathus whitehursti
5.5"min 30 galpeacefulEasy
Set a tank to check fit
Hermit crab
Scarlet Reef Hermit Crab
Paguristes cadenati
1.5"min 10 galpeacefulHermit crab · grazes algaeBeginner
Controls detritus & leftover food, film & diatoms, hair algae, cyanobacteria
Set a tank to check fit
Crab
Sally Lightfoot Crab
Percnon gibbesi
1.4"min 30 galpeacefulCrab · grazes algaeModerate
Controls film & diatoms, detritus & leftover food
Set a tank to check fit
Goby
Yellow Watchman Goby
Cryptocentrus cinctus
3.5"min 30 galpeacefulEasy
Pairs with a pistol shrimp.
Set a tank to check fit
Tang
Hippo Tang
Paracanthurus hepatus
11.8"min 180 galpeacefulModerate
Set a tank to check fit
Moray
Zebra Moray
Gymnomuraena zebra
47.2"min 125 galpeacefulModerate
Set a tank to check fit
Snail
Astrea Snail
Lithopoma tectum
1.3"min 10 galpeacefulSnail · grazes algaeEasy
Controls film & diatoms
Set a tank to check fit
Hawkfish
Longnose Hawkfish
Oxycirrhites typus
5.1"min 30 galsemi-aggressiveModerate
Set a tank to check fit
Cardinalfish
Pajama Cardinalfish
Sphaeramia nematoptera
3.1"min 20 galpeacefulEasy
Set a tank to check fit
Rabbitfish
One Spot Foxface
Siganus unimaculatus
7.9"min 100 galpeacefulModerate
Controls hair algae
Set a tank to check fit
Squirrelfish
Hawaiian Squirrelfish
Sargocentron xantherythrum
6.7"min 50 galpeacefulModerate
Set a tank to check fit
Anthias
Randall's Anthias
Pseudanthias randalli
2.8"min 70 galpeacefulModerate
Set a tank to check fit
Dottyback
Springer's Dottyback
Pseudochromis springeri
2.4"min 20 galsemi-aggressiveEasy
Set a tank to check fit
Sea star
Green Brittle Star
Ophiarachna incrassata
11.8"min 55 galpeacefulStarfishModerate
Set a tank to check fit
Seahorse
Lined Seahorse
Hippocampus erectus
7"min 30 galpeacefulExpert
Set a tank to check fit
Triggerfish
Blue-Throat Triggerfish
Xanthichthys auromarginatus
9.1"min 130 galsemi-aggressiveEasy
Set a tank to check fit
Angelfish
Coral Beauty Angelfish
Centropyge bispinosa
3.9"min 70 galsemi-aggressiveEasy
Set a tank to check fit
Lionfish
Volitans Lionfish
Pterois volitans
15"min 120 galsemi-aggressiveExpert
Set a tank to check fit
Basslet
Chalk Bass
Serranus tortugarum
3.1"min 30 galpeacefulEasy
Set a tank to check fit
Batfish
Pinnate Batfish
Platax pinnatus
17.7"min 300 galpeacefulExpert
Set a tank to check fit
Sea cucumber
Florida Sea Cucumber
Holothuria floridana
7.9"min 30 galpeacefulSea cucumber · grazes algaeBeginner
Controls sand-bed detritus, detritus & leftover food
Set a tank to check fit
Clownfish
Maroon Clownfish
Amphiprion biaculeatus
5.9"min 30 galaggressiveModerate
Hosts an anemone.
Set a tank to check fit
Boxfish
Spotted Boxfish
Ostracion meleagris
9.8"min 180 galpeacefulExpert
Set a tank to check fit
Dartfish
Blacktail Dartfish
Ptereleotris heteroptera
4.7"min 30 galpeacefulEasy
Set a tank to check fit
Grouper
Panther Grouper
Cromileptes altivelis
20.1"min 300 galaggressiveModerate
Set a tank to check fit
Blenny
Midas Blenny
Ecsenius midas
5.1"min 30 galsemi-aggressiveEasy
Set a tank to check fit
Damsel
Blue Damsel
Chrysiptera cyanea
2.8"min 30 galaggressiveEasy
Set a tank to check fit
Gramma
Brazilian Gramma
Gramma brasiliensis
3.1"min 40 galsemi-aggressiveModerate
Set a tank to check fit
Puffer
Whitespotted Toby
Canthigaster jactator
3.5"min 30 galsemi-aggressiveModerate
Set a tank to check fit
Shrimp
Peppermint Shrimp
Lysmata wurdemanni
2"min 10 galpeacefulShrimp · scavenges detritusBeginner
Controls aiptasia
Set a tank to check fit
Urchin
Pencil Urchin
Eucidaris tribuloides
5"min 30 galpeacefulUrchin · grazes algaeModerate
Controls film & diatoms
Set a tank to check fit
Wrasse
Sixline Wrasse
Pseudocheilinus hexataenia
3"min 60 galsemi-aggressiveEasy
Controls flatworms, bristleworms
Set a tank to check fit
Butterflyfish
Raccoon Butterflyfish
Chaetodon lunula
7.9"min 75 galpeacefulModerate
Set a tank to check fit
Dragonet
Spotted Mandarin
Synchiropus picturatus
2.8"min 55 galpeacefulExpert
Set a tank to check fit
Filefish
Orange-Spotted Filefish
Oxymonacanthus longirostris
4.7"min 30 galpeacefulExpert
Set a tank to check fit
Firefish
Firefish
Nemateleotris magnifica
3.1"min 20 galpeacefulEasy
Set a tank to check fit
Jawfish
Gold-specs Jawfish
Opistognathus randalli
4.3"min 30 galpeacefulModerate
Set a tank to check fit
Hermit crab
Zebra Hermit Crab
Calcinus laevimanus
1.2"min 10 galpeacefulHermit crab · grazes algaeBeginner
Controls film & diatoms, detritus & leftover food
Set a tank to check fit
Goby
Yellow Clown Goby
Gobiodon okinawae
1.4"min 10 galpeacefulEasy
Set a tank to check fit
Tang
Kole Tang
Ctenochaetus strigosus
5.9"min 70 galsemi-aggressiveModerate
Controls film & diatoms, detritus & leftover food
Set a tank to check fit
Moray
Chainlink Moray
Echidna catenata
28"min 125 galsemi-aggressiveModerate
Set a tank to check fit
Snail
Cerith Snail
Cerithium litteratum
1"min 10 galpeacefulSnail · grazes algaeBeginner
Controls detritus & leftover food, cyanobacteria, film & diatoms
Set a tank to check fit
Hawkfish
Flame Hawkfish
Neocirrhites armatus
3.5"min 30 galsemi-aggressiveModerate
Set a tank to check fit
Cardinalfish
Threadfin Cardinalfish
Zoramia leptacanthus
2.4"min 30 galpeacefulModerate
Set a tank to check fit
Rabbitfish
Bicolor Foxface
Siganus uspi
9.4"min 130 galpeacefulEasy
Controls hair algae
Set a tank to check fit
Squirrelfish
Blackbar Soldierfish
Myripristis jacobus
9.8"min 100 galpeacefulEasy
Set a tank to check fit
Anthias
Dispar Anthias
Pseudanthias dispar
3.7"min 70 galpeacefulModerate
Set a tank to check fit
Dottyback
Purple Dottyback
Pictichromis porphyrea
2.8"min 30 galaggressiveEasy
Set a tank to check fit
Sea star
Sand-Sifting Starfish
Astropecten polyacanthus
7.9"min 75 galpeacefulStarfish · sifts the sandExpert
Controls sand-bed detritus
Set a tank to check fit
Seahorse
Longsnout Seahorse
Hippocampus reidi
7"min 30 galpeacefulExpert
Set a tank to check fit
Triggerfish
Crosshatch Triggerfish
Xanthichthys mento
11.4"min 180 galsemi-aggressiveModerate
Set a tank to check fit
Angelfish
Lemonpeel Angelfish
Centropyge flavissima
5.1"min 70 galsemi-aggressiveModerate
Set a tank to check fit
Lionfish
Zebra Dwarf Lionfish
Dendrochirus zebra
7.1"min 50 galsemi-aggressiveModerate
Set a tank to check fit
Basslet
Swissguard Basslet
Liopropoma rubre
3.1"min 30 galpeacefulEasy
Set a tank to check fit
Clownfish
Red Saddleback Clownfish
Amphiprion ephippium
5.5"min 30 galsemi-aggressiveEasy
Hosts an anemone.
Set a tank to check fit
Boxfish
Longhorn Cowfish
Lactoria cornuta
18.1"min 250 galpeacefulExpert
Set a tank to check fit
Dartfish
Zebra Dartfish
Ptereleotris zebra
4.7"min 30 galpeacefulEasy
Set a tank to check fit
Blenny
Bicolor Blenny
Ecsenius bicolor
3.9"min 30 galsemi-aggressiveEasy
Controls film & diatoms
Set a tank to check fit
Damsel
Yellowtail Damsel
Chrysiptera parasema
2.8"min 30 galsemi-aggressiveEasy
Set a tank to check fit
Puffer
Dogface Puffer
Arothron nigropunctatus
13"min 150 galsemi-aggressiveModerate
Set a tank to check fit
Shrimp
Coral Banded Shrimp
Stenopus hispidus
3"min 30 galpeacefulShrimp · cleans fishEasy
Cleans other fish.
Set a tank to check fit
Wrasse
Leopard Wrasse
Macropharyngodon meleagris
3.9"min 90 galpeacefulExpert
Set a tank to check fit
Butterflyfish
Pearlscale Butterflyfish
Chaetodon xanthurus
5.5"min 90 galpeacefulModerate
Set a tank to check fit
Dragonet
Morrison's Dragonet
Synchiropus morrisoni
3.1"min 32 galpeacefulExpert
Set a tank to check fit
Filefish
Redtail Filefish
Pervagor melanocephalus
3.9"min 30 galpeacefulModerate
Set a tank to check fit
Hermit crab
Halloween Hermit Crab
Ciliopagurus strigatus
2"min 30 galpeacefulHermit crab · grazes algaeModerate
Controls detritus & leftover food, film & diatoms
Set a tank to check fit
Goby
Green Clown Goby
Gobiodon histrio
1.4"min 10 galpeacefulEasy
Set a tank to check fit
Tang
Sailfin Tang
Zebrasoma velifer
15"min 180 galsemi-aggressiveModerate
Controls hair algae
Set a tank to check fit
Moray
Golden Dwarf Moray
Gymnothorax melatremus
11.8"min 65 galsemi-aggressiveModerate
Set a tank to check fit
Snail
Nassarius Snail
Phrontis vibex
0.7"min 10 galpeacefulSnail · scavenges detritusBeginner
Controls detritus & leftover food, sand-bed detritus
Set a tank to check fit
Hawkfish
Falco Hawkfish
Cirrhitichthys falco
2.8"min 30 galsemi-aggressiveEasy
Set a tank to check fit
Cardinalfish
Flame Cardinalfish
Apogon maculatus
4.3"min 30 galpeacefulEasy
Set a tank to check fit
Rabbitfish
Magnificent Foxface
Siganus magnificus
9.4"min 130 galpeacefulEasy
Controls hair algae
Set a tank to check fit
Anthias
Lyretail Anthias
Pseudanthias squamipinnis
4.7"min 75 galpeacefulModerate
Set a tank to check fit
Dottyback
Neon Dottyback
Pseudochromis aldabraensis
3.9"min 30 galsemi-aggressiveEasy
Controls bristleworms
Set a tank to check fit
Triggerfish
Niger Triggerfish
Odonus niger
15.7"min 180 galsemi-aggressiveModerate
Set a tank to check fit
Angelfish
Bicolor Angelfish
Centropyge bicolor
5.9"min 70 galsemi-aggressiveModerate
Set a tank to check fit
Lionfish
Fuzzy Dwarf Lionfish
Dendrochirus brachypterus
6.7"min 50 galsemi-aggressiveModerate
Set a tank to check fit
Basslet
Yellow Assessor
Assessor flavissimus
2.8"min 30 galpeacefulEasy
Set a tank to check fit
Clownfish
Red Sea Clownfish
Amphiprion bicinctus
5.5"min 30 galsemi-aggressiveEasy
Hosts an anemone.
Set a tank to check fit
Dartfish
Blue Gudgeon Dartfish
Ptereleotris microlepis
4.7"min 30 galpeacefulEasy
Set a tank to check fit
Blenny
Lawnmower Blenny
Salarias fasciatus
5.1"min 30 galpeacefulEasy
Controls film & diatoms, hair algae
Set a tank to check fit
Damsel
Azure Damselfish
Chrysiptera hemicyanea
2.8"min 20 galsemi-aggressiveBeginner
Set a tank to check fit
Puffer
Porcupine Puffer
Diodon holocanthus
11.8"min 180 galsemi-aggressiveModerate
Set a tank to check fit
Shrimp
Tiger Pistol Shrimp
Alpheus bellulus
1.8"min 10 galpeacefulShrimp · scavenges detritusEasy
Pairs with a shrimp goby.
Set a tank to check fit
Wrasse
Lubbock's Fairy Wrasse
Cirrhilabrus lubbocki
3.1"min 55 galpeacefulEasy
Set a tank to check fit
Butterflyfish
Longfin Bannerfish
Heniochus acuminatus
9.8"min 130 galpeacefulEasy
Set a tank to check fit
Dragonet
Red Scooter Dragonet
Synchiropus stellatus
3.1"min 30 galpeacefulExpert
Set a tank to check fit
Goby
Diamond Goby
Valenciennea puellaris
5.9"min 30 galpeacefulModerate
Controls sand-bed detritus
Set a tank to check fit
Tang
Purple Tang
Zebrasoma xanthurum
9.8"min 125 galaggressiveModerate
Controls hair algae
Set a tank to check fit
Snail
Nerite Snail
Nerita funiculata
1"min 10 galpeacefulSnail · grazes algaeBeginner
Controls film & diatoms
Set a tank to check fit
Hawkfish
Arc-Eye Hawkfish
Paracirrhites arcatus
5.5"min 30 galsemi-aggressiveEasy
Set a tank to check fit
Cardinalfish
Ochre-striped Cardinalfish
Ostorhinchus compressus
4.7"min 55 galpeacefulEasy
Set a tank to check fit
Rabbitfish
Two-Barred Rabbitfish
Siganus virgatus
11.8"min 120 galpeacefulEasy
Controls hair algae
Set a tank to check fit
Anthias
Bartlett's Anthias
Pseudanthias bartlettorum
3.5"min 75 galpeacefulModerate
Set a tank to check fit
Dottyback
Royal Dottyback
Pictichromis paccagnellae
2.8"min 30 galaggressiveModerate
Controls bristleworms
Set a tank to check fit
Triggerfish
Rectangle Triggerfish
Rhinecanthus rectangulus
11"min 180 galaggressiveModerate
Set a tank to check fit
Angelfish
Potter's Angelfish
Centropyge potteri
3.9"min 55 galsemi-aggressiveExpert
Set a tank to check fit
Basslet
Blue Assessor
Assessor macneilli
2.4"min 30 galpeacefulEasy
Set a tank to check fit
Clownfish
Clark's Clownfish
Amphiprion clarkii
5.5"min 30 galsemi-aggressiveEasy
Hosts an anemone.
Set a tank to check fit
Dartfish
Filamented Dartfish
Ptereleotris hanae
4.7"min 30 galpeacefulEasy
Pairs with a pistol shrimp.
Set a tank to check fit
Blenny
Canary Blenny
Meiacanthus oualanensis
3.9"min 30 galsemi-aggressiveEasy
Set a tank to check fit
Damsel
Talbot's Damsel
Chrysiptera talboti
2.4"min 20 galpeacefulBeginner
Set a tank to check fit
Shrimp
Randall's Pistol Shrimp
Alpheus randalli
2"min 10 galpeacefulShrimp · scavenges detritusEasy
Pairs with a shrimp goby.
Set a tank to check fit
Wrasse
Melanurus Wrasse
Halichoeres melanurus
4.7"min 50 galsemi-aggressiveEasy
Controls bristleworms
Set a tank to check fit
Butterflyfish
Schooling Bannerfish
Heniochus diphreutes
8.3"min 125 galpeacefulEasy
Set a tank to check fit
Dragonet
Ruby Red Dragonet
Synchiropus sycorax
1.6"min 30 galpeacefulModerate
Set a tank to check fit
Goby
Neon Goby
Elacatinus oceanops
2"min 10 galpeacefulEasy
Cleans other fish.
Controls fish parasites (ich)
Set a tank to check fit
Tang
Powder Blue Tang
Acanthurus leucosternon
9.1"min 125 galsemi-aggressiveExpert
Controls hair algae
Set a tank to check fit
Snail
Mexican Turbo Snail
Turbo fluctuosus
2.5"min 10 galpeacefulSnail · grazes algaeEasy
Controls hair algae, film & diatoms
Set a tank to check fit
Hawkfish
Lyretail Hawkfish
Cyprinocirrhites polyactis
5.5"min 40 galsemi-aggressiveEasy
Set a tank to check fit
Cardinalfish
Orbiculate Cardinalfish
Sphaeramia orbicularis
3.9"min 30 galpeacefulEasy
Set a tank to check fit
Anthias
Sunburst Anthias
Serranocirrhitus latus
5.1"min 70 galpeacefulModerate
Set a tank to check fit
Dottyback
Diadem Dottyback
Pictichromis diadema
2.4"min 30 galaggressiveEasy
Set a tank to check fit
Triggerfish
Clown Triggerfish
Balistoides conspicillum
19.7"min 180 galaggressiveExpert
Set a tank to check fit
Angelfish
Cherub Angelfish
Centropyge argi
2.8"min 30 galsemi-aggressiveEasy
Set a tank to check fit
Basslet
Marine Betta
Calloplesiops altivelis
7.9"min 55 galpeacefulModerate
Set a tank to check fit
Clownfish
Tomato Clownfish
Amphiprion frenatus
5.1"min 30 galsemi-aggressiveEasy
Hosts an anemone.
Set a tank to check fit
Blenny
Forktail Blenny
Meiacanthus atrodorsalis
4.3"min 30 galsemi-aggressiveEasy
Set a tank to check fit
Damsel
Springer's Demoiselle
Chrysiptera springeri
2.4"min 25 galpeacefulEasy
Set a tank to check fit
Wrasse
Yellow Coris Wrasse
Halichoeres chrysus
4.7"min 50 galpeacefulEasy
Controls bristleworms
Set a tank to check fit
Butterflyfish
Big Longnose Butterflyfish
Forcipiger longirostris
8.7"min 79 galpeacefulExpert
Set a tank to check fit
Goby
Hi Fin Red Banded Goby
Stonogobiops nematodes
2.4"min 10 galpeacefulEasy
Pairs with a pistol shrimp.
Set a tank to check fit
Tang
Convict Tang
Acanthurus triostegus
10.6"min 130 galsemi-aggressiveModerate
Controls hair algae
Set a tank to check fit
Snail
Bumble Bee Snail
Engina mendicaria
0.7"min 10 galpeacefulSnail · scavenges detritusModerate
Controls bristleworms
Set a tank to check fit
Hawkfish
Redspotted Hawkfish
Amblycirrhitus pinos
3.5"min 30 galsemi-aggressiveEasy
Set a tank to check fit
Cardinalfish
Yellowstriped Cardinalfish
Ostorhinchus cyanosoma
3.1"min 20 galpeacefulEasy
Set a tank to check fit
Anthias
Square Anthias
Pseudanthias pleurotaenia
7.9"min 100 galsemi-aggressiveModerate
Set a tank to check fit
Dottyback
Striped Dottyback
Pseudochromis sankeyi
2.8"min 30 galsemi-aggressiveEasy
Set a tank to check fit
Angelfish
Multicolor Angelfish
Centropyge multicolor
3.5"min 55 galsemi-aggressiveModerate
Set a tank to check fit
Basslet
Candy Basslet
Liopropoma carmabi
2.4"min 20 galpeacefulModerate
Set a tank to check fit
Clownfish
Saddleback Clownfish
Amphiprion polymnus
5.1"min 40 galsemi-aggressiveEasy
Hosts an anemone.
Set a tank to check fit
Blenny
Starry Blenny
Salarias ramosus
5.5"min 50 galsemi-aggressiveEasy
Controls film & diatoms, hair algae
Set a tank to check fit
Damsel
Blue Reef Chromis
Chromis cyanea
5.1"min 30 galpeacefulEasy
Set a tank to check fit
Wrasse
Red Head Solon Fairy Wrasse
Cirrhilabrus solorensis
4.3"min 90 galpeacefulEasy
Set a tank to check fit
Butterflyfish
Double Saddle Butterflyfish
Chaetodon falcula
7.9"min 75 galsemi-aggressiveModerate
Set a tank to check fit
Goby
Rainford's Goby
Koumansetta rainfordi
2.8"min 20 galpeacefulExpert
Controls film & diatoms, hair algae
Set a tank to check fit
Tang
Achilles Tang
Acanthurus achilles
9.4"min 180 galsemi-aggressiveExpert
Controls hair algae
Set a tank to check fit
Anthias
Ignitus Anthias
Pseudanthias ignitus
3.5"min 70 galpeacefulModerate
Set a tank to check fit
Dottyback
Sunrise Dottyback
Pseudochromis flavivertex
2.8"min 30 galsemi-aggressiveEasy
Set a tank to check fit
Angelfish
Rusty Angelfish
Centropyge ferrugata
3.9"min 55 galsemi-aggressiveEasy
Set a tank to check fit
Basslet
Harlequin Bass
Serranus tigrinus
4.3"min 30 galsemi-aggressiveEasy
Set a tank to check fit
Clownfish
Pink Skunk Clownfish
Amphiprion perideraion
3.9"min 20 galpeacefulEasy
Hosts an anemone.
Set a tank to check fit
Blenny
Redlip Blenny
Ophioblennius atlanticus
4.7"min 30 galsemi-aggressiveEasy
Controls film & diatoms, hair algae
Set a tank to check fit
Damsel
Fiji Blue Devil Damsel
Chrysiptera taupou
3.1"min 30 galaggressiveEasy
Set a tank to check fit
Wrasse
Cleaner Wrasse
Labroides dimidiatus
4.5"min 90 galpeacefulExpert
Cleans other fish.
Controls fish parasites (ich)
Set a tank to check fit
Butterflyfish
Klein's Butterflyfish
Chaetodon kleinii
5.9"min 75 galpeacefulBeginner
Set a tank to check fit
Goby
Randall's Shrimp Goby
Amblyeleotris randalli
3.9"min 20 galpeacefulEasy
Pairs with a pistol shrimp.
Set a tank to check fit
Tang
Naso Tang
Naso lituratus
11.8"min 180 galsemi-aggressiveModerate
Set a tank to check fit
Anthias
Evansi Anthias
Pseudanthias evansi
3.9"min 70 galpeacefulExpert
Set a tank to check fit
Angelfish
Emperor Angelfish
Pomacanthus imperator
15"min 125 galsemi-aggressiveExpert
Set a tank to check fit
Basslet
Randall's Assessor
Assessor randalli
2.4"min 30 galpeacefulEasy
Set a tank to check fit
Clownfish
Ocellaris Clownfish
Amphiprion ocellaris
3.1"min 20 galpeacefulBeginner
Hosts an anemone.
Set a tank to check fit
Blenny
Molly Miller Blenny
Scartella cristata
4.3"min 30 galpeacefulBeginner
Controls film & diatoms, aiptasia, cyanobacteria
Set a tank to check fit
Damsel
Domino Damsel
Dascyllus trimaculatus
5.5"min 30 galaggressiveEasy
Set a tank to check fit
Wrasse
Red Coris Wrasse
Coris gaimard
15.7"min 130 galsemi-aggressiveExpert
Set a tank to check fit
Butterflyfish
Milletseed Butterflyfish
Chaetodon miliaris
5.9"min 70 galpeacefulEasy
Set a tank to check fit
Goby
Tangaroa Shrimp Goby
Ctenogobiops tangaroai
2.4"min 10 galpeacefulEasy
Pairs with a pistol shrimp.
Set a tank to check fit
Tang
Scopas Tang
Zebrasoma scopas
11.8"min 90 galsemi-aggressiveModerate
Controls hair algae
Set a tank to check fit
Anthias
Lori's Anthias
Pseudanthias lori
4.7"min 70 galpeacefulModerate
Set a tank to check fit
Angelfish
Regal Angelfish
Pygoplites diacanthus
9.8"min 125 galsemi-aggressiveExpert
Set a tank to check fit
Clownfish
Sebae Clownfish
Amphiprion sebae
5.5"min 30 galsemi-aggressiveEasy
Hosts an anemone.
Set a tank to check fit
Blenny
Barnacle Blenny
Acanthemblemaria macrospilus
2.4"min 10 galpeacefulEasy
Set a tank to check fit
Damsel
Neon Velvet Damsel
Neoglyphidodon oxyodon
5.5"min 30 galsemi-aggressiveEasy
Set a tank to check fit
Wrasse
Carpenter's Flasher Wrasse
Paracheilinus carpenteri
3.1"min 60 galpeacefulEasy
Set a tank to check fit
Butterflyfish
Pyramid Butterflyfish
Hemitaurichthys polylepis
7.1"min 125 galpeacefulEasy
Set a tank to check fit
Goby
Twinspot Goby
Signigobius biocellatus
3"min 50 galpeacefulExpert
Set a tank to check fit
Tang
Tomini Tang
Ctenochaetus tominiensis
5.9"min 75 galsemi-aggressiveModerate
Controls film & diatoms, detritus & leftover food
Set a tank to check fit
Anthias
Princess Anthias
Pseudanthias smithvanizi
3.7"min 74 galpeacefulModerate
Set a tank to check fit
Angelfish
Eibli Angelfish
Centropyge eibli
5.9"min 55 galpeacefulModerate
Set a tank to check fit
Clownfish
Cinnamon Clownfish
Amphiprion melanopus
4.7"min 30 galsemi-aggressiveEasy
Hosts an anemone.
Set a tank to check fit
Blenny
Red Sea Mimic Blenny
Ecsenius gravieri
3.1"min 20 galpeacefulEasy
Set a tank to check fit
Damsel
Four Stripe Damsel
Dascyllus melanurus
3.1"min 29 galaggressiveEasy
Set a tank to check fit
Wrasse
Christmas Wrasse
Halichoeres claudia
5.1"min 50 galsemi-aggressiveEasy
Controls bristleworms
Set a tank to check fit
Butterflyfish
Threadfin Butterflyfish
Chaetodon auriga
9.8"min 110 galsemi-aggressiveEasy
Set a tank to check fit
Goby
Pink Spotted Watchman Goby
Cryptocentrus leptocephalus
4.3"min 30 galpeacefulEasy
Pairs with a pistol shrimp.
Set a tank to check fit
Tang
Chevron Tang
Ctenochaetus hawaiiensis
9.8"min 180 galsemi-aggressiveModerate
Controls film & diatoms, detritus & leftover food
Set a tank to check fit
Angelfish
Pearlscale Angelfish
Centropyge vrolikii
4.7"min 55 galsemi-aggressiveModerate
Set a tank to check fit
Clownfish
Orange Skunk Clownfish
Amphiprion sandaracinos
4.3"min 20 galpeacefulEasy
Hosts an anemone.
Set a tank to check fit
Blenny
Smith's Blenny
Meiacanthus smithi
3.3"min 30 galpeacefulEasy
Set a tank to check fit
Damsel
Rolland's Damsel
Chrysiptera rollandi
2.4"min 20 galpeacefulBeginner
Set a tank to check fit
Wrasse
Exquisite Fairy Wrasse
Cirrhilabrus exquisitus
4.7"min 90 galpeacefulEasy
Set a tank to check fit
Goby
Wheeler's Watchman Goby
Amblyeleotris wheeleri
3.1"min 20 galpeacefulEasy
Pairs with a pistol shrimp.
Set a tank to check fit
Tang
Mimic Tang
Acanthurus pyroferus
9.8"min 125 galsemi-aggressiveModerate
Controls hair algae, film & diatoms
Set a tank to check fit
Angelfish
Keyhole Angelfish
Centropyge tibicen
7.5"min 60 galsemi-aggressiveModerate
Set a tank to check fit
Blenny
Striped Poison Fang Blenny
Meiacanthus grammistes
3.9"min 30 galsemi-aggressiveEasy
Set a tank to check fit
Damsel
Three Stripe Damsel
Dascyllus aruanus
3.1"min 26 galaggressiveEasy
Set a tank to check fit
Wrasse
Fourline Wrasse
Pseudocheilinus tetrataenia
3"min 50 galsemi-aggressiveEasy
Controls flatworms
Set a tank to check fit
Goby
Citron Clown Goby
Gobiodon citrinus
2.2"min 10 galpeacefulEasy
Set a tank to check fit
Tang
Vlamingi Tang
Naso vlamingii
19.7"min 250 galpeacefulModerate
Set a tank to check fit
Angelfish
Lamarck's Angelfish
Genicanthus lamarck
9.1"min 125 galpeacefulModerate
Set a tank to check fit
Wrasse
Scott's Fairy Wrasse
Cirrhilabrus scottorum
4.7"min 55 galpeacefulEasy
Set a tank to check fit
Goby
Sleeper Banded Goby
Amblygobius phalaena
5.9"min 30 galpeacefulEasy
Controls sand-bed detritus
Set a tank to check fit
Tang
Powder Brown Tang
Acanthurus japonicus
8.3"min 125 galsemi-aggressiveModerate
Controls hair algae
Set a tank to check fit
Angelfish
Bellus Angelfish
Genicanthus bellus
7.1"min 70 galpeacefulExpert
Set a tank to check fit
Wrasse
Rhomboid Fairy Wrasse
Cirrhilabrus rhomboidalis
3.9"min 55 galpeacefulEasy
Set a tank to check fit
Goby
Gold Head Sleeper Goby
Valenciennea strigata
6.3"min 30 galpeacefulModerate
Controls sand-bed detritus
Set a tank to check fit
Tang
Blonde Naso Tang
Naso elegans
17.7"min 180 galsemi-aggressiveModerate
Set a tank to check fit
Angelfish
Queen Angelfish
Holacanthus ciliaris
17.7"min 180 galsemi-aggressiveExpert
Set a tank to check fit
Wrasse
Pink-Streaked Wrasse
Pseudocheilinops ataenia
2.6"min 20 galpeacefulEasy
Set a tank to check fit
Goby
Engineer Goby
Pholidichthys leucotaenia
11.8"min 55 galpeacefulEasy
Set a tank to check fit
Tang
Desjardini Sailfin Tang
Zebrasoma desjardinii
15.7"min 180 galsemi-aggressiveModerate
Set a tank to check fit
Angelfish
Blueface Angelfish
Pomacanthus xanthometopon
15"min 220 galsemi-aggressiveExpert
Set a tank to check fit
Wrasse
Possum Wrasse
Wetmorella nigropinnata
3.1"min 30 galpeacefulEasy
Set a tank to check fit
Goby
Dracula Goby
Stonogobiops dracula
2.8"min 11 galpeacefulEasy
Pairs with a pistol shrimp.
Set a tank to check fit
Tang
Orange Shoulder Tang
Acanthurus olivaceus
13.8"min 180 galsemi-aggressiveModerate
Set a tank to check fit
Angelfish
Herald's Angelfish
Centropyge heraldi
4.7"min 53 galsemi-aggressiveEasy
Set a tank to check fit
Wrasse
Ornate Leopard Wrasse
Macropharyngodon ornatus
4.7"min 75 galpeacefulExpert
Set a tank to check fit
Goby
Orange Spotted Prawn Goby
Amblyeleotris guttata
3.5"min 11 galpeacefulEasy
Pairs with a pistol shrimp.
Set a tank to check fit
Angelfish
Majestic Angelfish
Pomacanthus navarchus
11"min 119 galsemi-aggressiveModerate
Set a tank to check fit
Wrasse
Dragon Wrasse
Novaculichthys taeniourus
11.8"min 125 galsemi-aggressiveModerate
Set a tank to check fit
Goby
Sharknose Goby
Elacatinus evelynae
1.6"min 10 galpeacefulEasy
Cleans other fish.
Controls fish parasites (ich)
Set a tank to check fit
Angelfish
African Flameback Angelfish
Centropyge acanthops
3.1"min 29 galsemi-aggressiveEasy
Set a tank to check fit
Wrasse
Divided Leopard Wrasse
Macropharyngodon bipartitus
5.1"min 55 galpeacefulExpert
Set a tank to check fit
Goby
Sixspot Sleeper Goby
Valenciennea sexguttata
5.5"min 29 galpeacefulModerate
Set a tank to check fit
Wrasse
Coral Hogfish
Bodianus mesothorax
7.9"min 90 galsemi-aggressiveEasy
Cleans other fish.
Set a tank to check fit
Wrasse
Lunare Wrasse
Thalassoma lunare
9.8"min 119 galaggressiveEasy
Set a tank to check fit
Wrasse
Spanish Hogfish
Bodianus rufus
15.7"min 151 galsemi-aggressiveEasy
Cleans other fish.
Set a tank to check fit
Wrasse
Social Fairy Wrasse
Cirrhilabrus rubriventralis
3.1"min 30 galpeacefulEasy
Set a tank to check fit
How we check: each species' minimum tank size against your display volume, plus quantities and behaviour pairings between tankmates.
Basslet
Randall's Assessor
Assessor randalli
Randall's Assessor is the least common of the three Assessor species in the hobby — a small, dark blue-black basslet with yellow markings that hovers upside-down under ledges and cave ceilings, just like its better-known Blue and Yellow Assessor cousins. It's peaceful, reef safeWon't harm corals or invertebrates, so it's safe to keep in a reef tank rather than a fish-only setup., and readily takes frozen meaty foods, making it easy to keep once settled, though it wants a well-shaded cave system and can be territorial around its chosen den. Wild collection is rare and largely limited to Japan, so most trade stock comes from a handful of dedicated captive-breeding programmes — expect a higher price and inconsistent availability rather than a shop staple.
Temperament
Peaceful
Max size
2.4"
Min tank
30 gal
Care
Easy
Diet
Planktivore
Reef-safe
Reef safe
Zone
Rockwork, Caves
Lifespan
5–7 years
Flow
Medium flow
Sourcing
Occasionally aquacultured
Keep just one per tank — two will fight.
Care & compatibility guidance only — confirm this fish’s needs and temperament with your supplier before you buy. Disclaimer
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