Yellow tang

(Movie).The yellow tang (Zebrasoma flavescens), also called Pacific tang, is a saltwater fish species of the family Acanthuridae. It is one of the most popular aquarium fish.

Appearance
Yellow tang are in the surgeonfish family, and are therefore significantly laterally compressed. Adult fish can grow to 18 centimeters in length, and 1 to 2 centimeters (< 1 inch) in thickness. Males tend to be slightly larger than females. All individuals of this species and are bright yellow in color. During the night, a prominent brownish patch develops in the middle of both sides with a horizontal white band. They rapidly resume their all-over sulphur-yellow color with daylight.

They have an arrow-like shape due to their dorsal and ventral fins being almost an extension to their bodies, and a long snout-like mouth used (as with other tangs) to eat the algae off rocks and coral. They are almost fully herbivores, and have become a popular fish in the marine fish hobby. They also have a sharp spine located near their tail.

Food
Wild grasses, algae, lettuce, and other plant life in general. The yellow tang can also be found eating shrimp and other smaller animals.

Distribution and habitats
It is commonly found in shallow reefs, from 2 to 46 m deep, in the Pacific and Indian Oceans, west of Hawaii and east of Japan.

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