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.
Quora User, betta fish owner. They come from Thailand! At least, that's where it's most commonly cited. More broadly they come from Southeast Asia, so anywhere in the area of Thailand, Indonesia, Vietnam--you'll find wild Bettas in any part of the world that used to be called Siam (which is where we get the name Siamese Fighting Fish).