Fin-joined goby (Gobulus birdsongi), first described by Hoese & Reader, 2001 is a small fish in the family Gobiidae (order Gobiiformes). Adults typically reach 5.80 cm in maximum length. It inhabits marine coastal and open-ocean environments. Recorded depth range: 13 to 20 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 Gobiidae kept in the hobby.
Dorsal spines (total): 8; Dorsal soft rays (total): 13; Anal soft rays: 13; Vertebrae: 27. . This species is distinguished by the following set of characters: D2 I,11; A I,13; pectoral rays 16-18; eye small, 1.4 mm in length (2:46 and 58 mm SL); D1 connected to base of D2; pelvic interspinal membrane is very reduced; fifth pelvic ray is subequal in length to fourth ray; upper edge of the dark body stripe well above midside of body .Cross section: oval.
Behavioural data for Fin-joined goby is currently being reviewed.
Marine; demersal; depth range 13 - 20 m . Tropical Central Pacific: Panama.
The following diseases are known to affect Fin-joined goby.
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