Distinctive Characters: Dorsal fin with 13 spines and 24-25 rays. Anal fin with 3 spines and 20-21 rays. Pectoral fin with 14-15 rays. Body depth 1.4 in standard length.
Colour: Background colour white. Broad black eye band. Posterior part of body mostly black, but with yellow markings on tail and anal fin. Two perpendicular series of grey lines on side.
Habitat and Biology: Found in many habitats ranging from rich coral reefs to rubble and rocky areas at depths of up to 20 m. Feeds mainly on algae and coral polyps.
Distribution: Maldives to Western Indonesia.
Remarks: Chaetodon decussatus is not especially common in Maldives. It is very similar in appearance to C. vagabundus and two have frequently been confused. This confusion has been compounded by the fact that in the Red Sea and Gulf of Aden there is a sub-species of C. vagabundus (known as C. vagabundus pictus) which has a much broader posterior black band than usual.