The Yellow Tang is a saltwater species and one of the most popular aquarium fish. Yellow Tangs were first described by English naturalist Edward Turner Bennett in 1828 from a collection in the Hawaiian Islands. Its species name is the Latin adjective flavescens, or “yellow.” Adult Yellow Tangs can grow to nearly 8 inches in length. Yellow Tang are bright yellow in color. At night, the yellow coloring fades slightly, and a prominent brownish patch develops in the middle with a horizontal white band. They rapidly resume their bright yellow color during daylight.