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.
Moorish Idol popularity increased with the release of the kid's movie Finding Nemo but as most hobbyists soon found out, the Moorish Idol is very tough to acclimate and keep. Long term survivability of this species in home aquariums is rare.