The Eight Line Cardinalfish (Cheilodipterus alleni) is a tropical fish species that is a member of the ‘Cardinalfishes’ family Apogonidae. Cardinalfishes are unique in that the males carry the fertilised eggs in his mouth and he cares for the young when they hatch. Its distribution includes the waters of Malaysia, Indonesia, Philippines and Papua New Guinea. It can be found occurring on coral reefs from depths of 3 to 20 metres and it is considered to be common in the tropical waters that are in close proximity to the equator. It can be recognised by the 8 stripes extending horizontally along the body and the black tip on its first dorsal fin. It is a solitary species and is the largest species in the Cheilodipterus genus. The Eight Line Cardinalfish (Cheilodipterus alleni) grows to a maximum length of approximately 24cm.