Common name: Hartzfeld's cardinalfish

General information

Hartzfeld's Cardinalfish, scientifically known as Ostorhinchus hartzfeldii, is a small and colorful marine fish that is a popular choice among aquarists due to its peaceful nature and striking appearance. It is characterized by its vibrant orange to red body with a distinctive horizontal blue line running from the snout through the eye to the caudal peduncle.

Care

This species is relatively easy to care for, making it suitable for both beginner and experienced hobbyists. They prefer a well-established aquarium with plenty of hiding spaces among live rock or dense vegetation. They are nocturnal and may be shy during the day, so providing dim lighting or shaded areas can help them feel secure. A varied diet of small meaty foods like mysis shrimp, brine shrimp, and finely chopped seafood is recommended to maintain their health and coloration.

Reproduction

Ostorhinchus hartzfeldii is a mouthbrooder, with males incubating the eggs in their mouths until they hatch. This fascinating reproductive behavior can sometimes be observed in the home aquarium, offering a unique opportunity to witness parental care in fish.

Habitat

Native to the Western Pacific, Hartzfeld's Cardinalfish is found in coral reefs and lagoons, typically at depths ranging from 1 to 18 meters. They often form small groups and can be seen hovering in sheltered areas or among branching corals.