Stethojulis bandanensis (Bleeker, 1851)
Abundant in the Solitary Islands Marine Park. Recorded from the Indo-Pacific region including Andaman sea, Christmas and Cocos-Keeling Islands: then from Japan south to New South Wales, east to the Galapagos Islands. In Australia recorded from Geraldton to north eastern Western Australia, from Torres Strait south to central New South Wales and including Lord Howe and Norfolk Islands.
Frequents shallow clear waters of offshore reefs and lagoons, areas of coral and rocky reef and rubble. Depth to 30m.
Initial phase shown in top photograph. Adult male darker green/blue above and pale below, lower photograph. Red crescent over pectoral fin base is identifying feature, even in small juveniles. Usually solitary or in small groups, feeds on small benthic invertebrates and demersal planktonic crustaceans. Grows to 15cm.