Teleostei (teleosts) >
Kurtiformes (Nurseryfishes, cardinalfishes.) >
Apogonidae (Cardinalfishes) > Apogoninae
Etymology: rubrimacula: From the Latin ruber, red, and macula, spot, in reference to the conspicuous red spot at the midbase of the caudal fin.
More on authors: Randall & Kulbicki.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; reef-associated; depth range 0 - 33 m (Ref. 33415). Tropical; 22°N - 28°S, 120°E - 178°E
Western Central Pacific: Ryukyu Islands south to Australia; Indonesia (Ref. 90102) east to Fiji Islands (Ref. 56673).
Length at first maturity / Size / Weight / Age
Maturity: Lm 3.5 range ? - ? cm
Max length : 4.5 cm SL male/unsexed; (Ref. 33415); max. reported age: 4 years (Ref. 56673)
Dorsal spines (total): 8; Dorsal soft rays (total): 9; Anal spines: 2; Anal soft rays: 8; Vertebrae: 24. Predorsal scales 4; preopercular edge serrate; preopercular ridge smooth to slightly crenulate; body depth 2.85-3.05 in SL; silvery blue-gray with 6 orange to orange-yellow stripes on head and body, those on body narrower than blue-gray interspaces; third orange-yellow stripe from dorsal edge of eye ending below space between dorsal fins; midlateral orange-yellow stripe ending in a red spot at base of caudal fin (Ref. 33415).
Body shape (shape guide): elongated; Cross section: oval.
Inhabit coral reef (Ref. 75154). Form small aggregations (Ref. 33415). Distinguished from A. cyanosoma by the presence of a single red spot at the midbase of the caudal fin, a higher number of gill rakers, and apparently a smaller maximum size (Ref. 33415).
Mouthbrooders (Ref. 240). Distinct pairing during courtship and spawning (Ref. 205).
Randall, J.E. and M. Kulbicki, 1998. Two new cardinalfishes (Perciformes: Apogonidae) of the Apogon cyanosoma complex from the western Pacific, with notes on the status of A. wassinki Bleeker. Rev. Fr. Aquariol. 25(1-2):31-39. (Ref. 33415)
IUCN Red List Status (Ref. 130435: Version 2025-2)
Threat to humans
Harmless
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