One Spot Foxface

A rabbitfish with a bright yellow body, a black-and-white banded face and a single large black blotch on the flank that separates it from the plain Foxface Lo. Its dorsal spines are venomous — that is its defence, not a threat to tankmates, and it is the reason a peaceful herbivore this size can be housed alongside aggressive fish, but it also means you handle it carefully and never net it barehanded. It is a heavy grazer that will clear hair algae and eat nori all day; a well-fed one usually leaves corals alone, while a hungry one may nip soft corals, zoanthids and LPS, so this is a reef fish with an asterisk. At roughly 20 cm and always on the move it needs real swimming length, not just volume.