Gymnapogon Janus (Gymnapogon janus), first described by Fraser, 2016 is a small fish in the family Apogonidae (order Apogoniformes). Adults typically reach 6.30 cm in maximum length. It inhabits marine coastal and open-ocean environments. Recorded depth range: 0 to 38 metres. It occurs in Tropical waters. It feeds on a mix of small fish and invertebrates as a mid-level predator. On the IUCN Red List, it is classified as Data Deficient.The species is kept in the aquarium hobby. Care requirements and behaviour align broadly with other Apogonidae kept in the hobby.
Dorsal spines (total): 7; Dorsal soft rays (total): 10; Anal spines: 2; Anal soft rays: 9 - 10; Vertebrae: 24. This species is distinguished by the following characters: A 9-10 with anterior-most ray unbranched; D 10, the two anterior-most rays unbranched; pectoral fins 14, 9 branched and 5 unbranched; caudal fin rounded, principal caudal rays 17. 15 branched; vomer with one row of two villiform teeth on each side .Cross section: oval.
Behavioural data for Gymnapogon Janus is currently being reviewed.
Marine; benthopelagic; depth range 0 - 38 m . Tropical Central Pacific: Philippines.
The following diseases are known to affect Gymnapogon Janus.
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