The Comet is easily recognised by its dark colour with numerous white spots, the ocellus (glossary) at the base of the last dorsal rays and the lanceolate tail.
The Comet is a secretive fish which is not often observed during the day. When alarmed, it will dart head first into the coral and leave the posterior part of the body exposed. In this position the fish looks like the head of a Whitemouth Moray Eel, Gymnothorax meleagris, with the ocellus mimicking the eye and the gap between the caudal and anal fins resembling the mouth.
The Comet occurs on coral reefs throughout the Indo-west Pacific. In Australia it is recorded from north-western Australia and the Great Barrier Reef.
This species grows to 16cm in length.