Smalltail Wrasse

Pseudojuloides cerasinus in their male or terminal phase has a distinctive blue mid-lateral stripe which is situated immediately above a yellow stripe and the posterior portion of the caudal fin is black, edged with blue. In these males the body is an overall green colour and they have a single blue facial stripe. Some males show black spots on the membranes between the first two spines on the dorsal fin. Females of all species in the genus Pseudojuloides tend to be orange or reddish in colour. This is a small species which grows to a total length of 103 millimetres (4.1 in).

Pseudojuloides cerasinus is frequently recorded in clear lagoon and near seaward reefs over coral rubble substrates, it is infrequently recorded over live coral and clumps of algae. It inhabits depths of around 3–61 metres (9.8–200.1 ft), although it is more common at depths in excess of 21 metres (69 ft).