The rabbit's long ears, which can be more than 10 cm (4 in) long, are probably an adaptation for detecting predators. They have large, powerful hind legs. The two front paws have 5 toes, the extra called the dewclaw.
However, Moorish idol larvae spend a long time drifting through the open ocean before they mature, so regional populations donât remain isolated enough to develop particular traits. Because of its beauty and its identity as a quintessential reef fish, the Moorish idol is a very popular fish in the aquarium trade.
However, it is the only species of the genus Zanclus and is more closely related to the surgeonfish family. The Moorish idolâs resemblance to the butterflyfish is more than a coincidence. The shared feeding habits between these types of fish have led to their similar appearance.