Threadfin Sandgoby, Nesogobius sp. 2 (of Hoese & Larson)


A Threadfin Sandgoby, Nesogobius sp. 2. Source: Rudie H. Kuiter / Aquatic Photographics. License: All rights reserved

Summary:
An brownish sandgoby with small dark spots scattered on a sandy-brown head, a brown bar from the eye to the middle of the jaw, pale blue dashes along the midsides with narrow vertical brown lines above and below the spaces between the dashes, and oblique rows of small orange and black spots on the dorsal fins. Males have elongate finrays at the rear of the dorsal fin. 

Doug Hoese and Helen Larson are currently working on Nesogobius.

Cite this page as:
Bray, D.J. 2018, Nesogobius sp. 2 (of Hoese & Larson) in Fishes of Australia, accessed 19 Sep 2020, http://136.154.202.208/home/species/5251

Threadfin Sandgoby, Nesogobius sp. 2 (of Hoese & Larson)

More Info


Distribution

Endemic to southern Australia, from Wilson's Promontory, Victoria, to Kangaroo Island and the Gulf St Vincent, South Australia, and around Tasmania. Although this species occasionally occurs on sandy areas just beyond seagrass beds, most specimens have been taken in trawls in depths to 55 m.

Features

Dorsal fin VI + I, 8-9; Anal fin I, 8-9; Caudal fin (segmented rays) 13, (branched rays) 9; Pectoral fin 17-19; Pelvic fin I, 5; Gill rakers 0-2 + 6-8 = 7-9.  
Body slender. Head of moderate size (28-33% SL), broader than deep; interorbital narrow, eyes almost touching; mouth oblique, small, rear end of jaws below front quarter of eyes; sensory pores present by each nostril, sometimes median pore between front of eyes, sometimes median pore between rear end of eyes; pore behind upper quarter of each eye and pore behind middle of each eye; pore above rear end of each preopercular margin, no preopercular pores; gill openings broad, reaching forward to below and just before posterior preopercular margins; no groove behind posterior preopercular margin on each side; tongue tip truncate. 
Head naked; body scales ctenoid, in 26-30 vertical rows; anterior extent of scales at a line from upper pectoral fin insertions to second dorsal fin origin; midline of belly without scales; pectoral fin bases and area before pelvic fins without scales. 
Two dorsal fins, first dorsal fin small, higher anteriorly, with first spine longest first dorsal origin above pelvic fin insertions; second dorsal-fin origin just behind first dorsal fin; last ray in second dorsal fin often elongate in males. Anal fin origin below and just behind second dorsal origin. Caudal fin short, with truncate margin. Pectoral fins large, with rounded margin. Pelvic fins fused to form large cup-shaped disc, inserted just behind pectoral fin origins and reaching to anal fin origin.

Size


Colour

Sandy brown head with numerous scattered small dark brown spots; area below eyes dark brown; irregular brown bar from each eye to middle of jaws; body with series of six to eight very small brown spots on midside, often with vertical thin brown lines extending ventrally from spots; horizontal broken thin white stripe just below midside; rear of caudal peduncle with a chevron-shaped brown mark, often broken into three spots at the apices of a triangle; dorsal fins with small orange and black spots forming oblique rows; enlarged black spot often in female at end of fin on membrane after last dorsal spine; anal fin clear to dusky; caudal fin clear, often with vertical wavy bands; pectoral and ventral fins clear to white; brown spot dorsally on each pectoral-fin base.

Feeding


Biology


Fisheries


Conservation


Remarks


Similar Species


Etymology


Species Citation


Author

Bray, D.J. 2018

Resources


Threadfin Sandgoby, Nesogobius sp. 2 (of Hoese & Larson)

References


Hoese, D.F. & Larson, H.K. 1994. Family Gobiidae. pp. 781-810 in Gomon, M.F., Glover, C.J.M. & Kuiter, R.H. (eds) The Fishes of Australia's South Coast. Adelaide : State Printer 992 pp.

Hoese, D.F. & Larson, H.K. 2008. Family Gobiidae. pp. 749-773 in Gomon, M.F., Bray, D.J. & Kuiter, R.H. (eds) Fishes of Australia's Southern Coast. Sydney : Reed New Holland 928 pp.

Quick Facts


Depth:7-55 m

Habitat:Sandy areas

Max Size:6 cm TL

Native:Endemic

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