Threadfin Cardinalfish

Semi-transparent to whitish in color with blue spots and incomplete, narrow, orange bars on head and anterior part of body (Ref. 2334). Tall first dorsal fin, eyes blue (Ref. 48635). Elongate first dorsal fin; greatest depth of body 2.1-2.6 in SL (Ref. 90102).

Mouthbrooders (Ref. 240). Distinct pairing during courtship and spawning (Ref. 205). Displays obligate monogamy where a one-to-one pair is established irrespective of resource abundance (Ref. 52884).

Dorsal spines (total): 7; Dorsal soft rays (total): 9; Analspines: 2; Analsoft rays: 9

Nocturnal species (Ref. 75154) which lives in schools in branching corals (Ref. 9137). Exhibits the black gut phenomenon. In nocturnal predators, it appears to serve to conceal bioluminiscent prey in the stomach cavity (Ref. 46685).

Dense aggregations (often mixed with other species, like Archamia fucata, A. zosterophora are found above mounds of branching coral Porites cylindrica in sheltered, often turbid bays and lagoons (Ref. 1602, 48635). Nocturnal species (Ref. 7300).

aquarium: commercial