Threadfin Cardinalfish

The Threadfin Cardinalfish (Zoramia leptacantha) is a tropical marine species typically found at depths ranging from 1 to 12 meters. This species reaches a maximum length of approximately 6 centimeters and is characterized by a semi-transparent to whitish body coloration, complemented by distinctive blue spots and incomplete narrow orange bars on the head and anterior portion of the body. The species is notable for its tall, elongate first dorsal fin and striking blue eyes.

The Threadfin Cardinalfish commonly forms dense aggregations, often in combination with other species, and is predominantly observed above mounds of branching coral, specifically Porites cylindrica, located in sheltered and frequently turbid bays and lagoons. This species exhibits nocturnal behavior.

Biologically, the Threadfin Cardinalfish practices mouthbrooding and demonstrates distinct pairing during its courtship and spawning phases. The species is known for obligate monogamy, establishing one-to-one pair bonds regardless of resource availability.

The geographic distribution of the Threadfin Cardinalfish spans the Indo-Pacific region, including the 🌊 Red Sea, 🇲🇿 Mozambique Island, 🇼🇸 Samoa, 🇹🇴 Tonga, north to the Ryukyu Islands (🇯🇵 Japan), and south to 🇳🇨 New Caledonia (🇫🇷 Overseas France), with presence throughout 🇫🇲 Micronesia.