Idol worship?

Almost every time we snorkel here, we encounter Moorish idols (kihikihi).  They are really graceful-looking fish, with distinctive markings and a long, filatmentous spine on their dorsal fin.  They have no close relatives, being the only species in the family Zanclidae.  They reach 8 inches in length, and occur in the Indo-Pacific and tropical eastern Pacific Ocean.  They feed on sponges and algae.

A pair of Moorish idols

OK, not always graceful while feeding on algae