(Chromis abyssus)
Chromis abyssus is a species of damselfish first discovered in 1997 and described in 2008. The 8 centimetres (3.1 in) long fish only lives more than 110 m (361 ft) below the surface of the Pacific Ocean around the coast of the Ngemelis Islands, Palau. Adults have been observed living singly or in pairs, whereas juveniles tend to live in groups.