Whip fin wrasse

The whip-fin wrasse (so named for the long filament extending from the top of the dorsal fin), Cirrhilabrus filamentosus, is a species of wrasse endemic to Indonesia, where it is only known from the waters of the Java Sea. This species inhabits reefs and can be found at depths from 10 to 35 m (33 to 115 ft). It can reach 8 cm (3.1 in) in total length.