Common name: Southern orange-lined cardinal fish

General information

The Twospot Cardinalfish, Ostorhinchus properuptus, is a small and peaceful marine fish that is well-suited for community aquariums. It is known for its distinctive two spots - one at the base of the caudal fin and another near the gill cover. This species is nocturnal and tends to be more active during the evening or with subdued lighting.

Care

Twospot Cardinalfish are relatively easy to care for and can be kept in small groups. They prefer a well-established aquarium with plenty of hiding places among live rock or soft corals. These fish are not aggressive and can be housed with other peaceful tank mates. They accept a variety of foods including small pellets, flake foods, and frozen or live brine shrimp and mysis.

Reproduction

Like many cardinalfish, Ostorhinchus properuptus is a mouthbrooder. The male carries the fertilized eggs in his mouth until they hatch, providing protection from predators. This fascinating reproductive behavior can sometimes be observed in the home aquarium.

Habitat

Twospot Cardinalfish are found in the Western Pacific, from Indonesia to the Great Barrier Reef and west to the Solomon Islands. They inhabit coral reefs and lagoons, often sheltering in staghorn corals or among the branches of soft corals.