Cantherhines sandwichiensis, also called sandwich isle filefish, squaretail filefish, or - in Hawaiian - ōililepa. It is a marine fish in the family Monacanthidae.

Description It can reach up to about in length. Its body is brown with a glean of purple or blue, while its fins are yellow.

Distribution and habitat Cantherhines sandwichiensis lives in reef ecosystem habitats, at depths of , with a range from Hawai'i, Oceania, western Indian and Atlantic Oceans.

Behavior It is a bottom feeder that also eats other things such as coral.

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