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Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Apogonidae (Cardinalfishes) > Apogoninae
Etymology: nanus: Name from Latin 'nanus' meaning dwarf, referring to its size being one of the smallest in the genus.

Environment / Climate / Range Ecology

Marine; reef-associated; depth range 3 - 20 m (Ref. 48635). Tropical, preferred ?

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Western Central Pacific: Madang, Papua New Guinea; Maumere, Indonesia; and, near Kota Kinabalu, Sabah, Malaysia.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 6.0 cm SL male/unsexed; (Ref. 48635)

Short description Morphology | Morphometrics

Dorsal spines (total): 7; Dorsal soft rays (total): 9; Anal spines: 2; Anal soft rays: 8; Vertebrae: 24. This species is distinguished by having D VI-I,9; A II,8; pectoral rays 13; lateral line scales 24; predorsal scales 5; gill rakers 7 or 8+20 or 21, excluding an indistinct rudiment on upper limb; preopercular margin serrate; preopercular ridge smooth; body depth 3.4-3.7 in SL; semi-transparent in life with golden-brown midlateral strip, bordered below by narrow silver stripe; tip of lower jaw blackish (Ref. 11893).

Occurs in silty inshore reefs; aggregations observed hovering during the day around both soft and hard coral formations. An oral brooding male collected at Madang, papua New Guinea, contained 328 eggs, which is a relatively low number for the genus (Ref. 11893).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Mouthbrooders (Ref. 240). Distinct pairing during courtship and spawning (Ref. 205).

Main reference Upload your references | References | Coordinator | Collaborators

Allen, G.R., R.H. Kuiter and J.E. Randall, 1994. Descriptions of five new species of cardinalfishes (Apogonidae: Apogon) from Maumere Bay, Flores, Indonesia and surrounding regions. Rev. Fr. Aquariol. 21(1-2):27-38. (Ref. 11893)

IUCN Red List Status (Ref. 115185)

Not Evaluated

CITES (Ref. 94142)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO(Publication : search) | FisheriesWiki | Sea Around Us

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Internet sources

Ostorhinchus nanus (Allen, Kuiter & Randall, 1994)