The Sickle Butterflyfish, also known as the Falcula Butterflyfish, is mostly white becoming yellow dorsally. It has a series of narrow black stripes on its sides, two patches of black on the dorsal side, and a black eye band.
A 300 litre or larger fish-only aquarium with other butterflyfish is a good environment. The Falcula Butterflyfish will eat anemones, hard corals, and mushroom anemones causing problems in a reef aquarium.
It should be fed a variety of meaty foods, crustacean flesh, mysis shrimp, frozen preparations, with an occasional anemone as a treat.