Common name: Threadfin Cardinalfish

General information

The Threadfin Cardinalfish, scientifically known as Ostorhinchus pselion, is a small and peaceful marine fish that is well-suited for the home aquarium. Its delicate appearance, characterized by a slender body and long, thread-like fin extensions, makes it a visually appealing addition to a reef or fish-only setup. This species is nocturnal and tends to be more active during the evening hours.

Care

Threadfin Cardinalfish are relatively easy to care for, making them suitable for both beginner and advanced aquarists. They thrive in a well-established aquarium with stable water conditions and plenty of hiding places. These fish are social and do best in small groups or pairs. A varied diet of small meaty foods, such as mysis shrimp and brine shrimp, will help maintain their health and coloration.

Reproduction

In the wild, Threadfin Cardinalfish are mouthbrooders, with males taking on the responsibility of carrying the eggs in their mouths until they hatch. This fascinating reproductive behavior can also be observed in the home aquarium, providing an interesting spectacle for the aquarist.

Habitat

Ostorhinchus pselion is found in the Western Pacific, inhabiting coral reefs and lagoons. They prefer areas with calm waters and can often be seen hovering in small groups near reef structures or over sandy bottoms.