Acanthurus pyroferus is a species of fish in the family Acanthuridae, the unicornfishes and tangs. Its common names include chocolate surgeonfish, mimic surgeonfish, orange-gilled surgeonfish, Pacific mimic surgeon, and yellowspot surgeon.This fish can be found in the Indo-Pacific, excluding Hawaii. It lives primarily around steep, shallow slopes near the coast with clear sand and corals. It reaches 25 centimeters in length.This fish is occasionally kept in aquaria.