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.
Blenny
Midas Blenny
Ecsenius midas
A stunning golden blenny that behaves less like a rock-perching blenny and more like an anthias, hovering out in open water and flashing an iridescent blue margin. That boldness has a downside: it grows to a solid 13 cm and harasses slender, peaceful mid-water fish such as flasher wrasses, firefish, and small gobies, so it earns a "semi-aggressive" tag despite the "peaceful" label on most price lists. Hardy and easy to feed otherwise, and best kept one per tank.
Temperament
Semi-aggressive
Max size
5.1"
Min tank
30 gal
Care
Easy
Diet
Planktivore
Reef-safe
Reef safe
Zone
Rockwork, Mid-water, Open water
Lifespan
5–7 years
Flow
High flow
Sourcing
Wild-caught only
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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