Blackstriped Cardinalfish

The blackstripe cardinalfish, scientifically known as Ostorhinchus nigrofasciatus, is a species indigenous to the Indo-Pacific region. This cardinalfish, identifiable by its distinctive yellow and black stripes, occasionally finds its way into the aquarium trade. It can attain a length of up to 10 cm, with a common length of approximately 7 cm.

This tropical species is typically associated with marine reefs, inhabiting depths ranging from 3 to 50 meters. It is commonly found in reef flats and shallow lagoon reefs, often observed alone or in pairs, seeking shelter under ledges or within crevices. The blackstripe cardinalfish primarily feeds on small benthic invertebrates during nocturnal hours.

The species is recognized by its pointed snout and predominantly white body, accentuated by alternating black and yellow stripes, with the black stripes being more pronounced.

Exhibiting mouthbrooding behavior, Ostorhinchus nigrofasciatus engages in distinct pairing during courtship and spawning periods.

Geographically, the blackstripe cardinalfish is documented throughout the Indo-Pacific, from the 🌊 Red Sea and Christmas Island in the 🌊 Indian Ocean, extending to the Tuamotu (🇵🇫 French Polynesia) Islands, and reaching as far north as southern 🇯🇵 Japan and south to 🇳🇨 New Caledonia (🇫🇷 Overseas France) and Rapa. In the western 🌊 Indian Ocean, it is also present along the coast of 🇲🇿 Mozambique.