Scary's Tasmangoby, Tasmanogobius lasti Hoese 1991


Other Names: Lagoon Goby, Scary's Tasman Goby

Scary's Tasmangoby, Tasmanogobius lasti. Source: Michael Hammer. License: All rights reserved

Summary:
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Cite this page as:
Martin F. Gomon, Tasmanogobius lasti in Fishes of Australia, accessed 17 Nov 2018, http://fishesofaustralia.net.au/home/species/479

Scary's Tasmangoby, Tasmanogobius lasti Hoese 1991

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Distribution

A temperate Australian species known only from Hollands Landing, VIC (147°25'E) to Kangaroo Is., SA (137°11'E) and throughout coastal TAS; benthic, inhabiting sandy or muddy bottomed estuaries and the lower reaches of freshwater streams.

Features

D VII-IX; 13-16; A 12-16; C (segmented rays) 16-17, (branched rays) 13-17; P 16-20; V I, 5; Vert 12-13 + 18-20 = 20-22; GR 1-3 + 4-7 = 5-10.
Body slender, depth 15.3-16.4% SL. Head small, length 3.6-3.9 in SL, slightly compressed Anterior nostril at end of short tube, about midway between upper margin of upper lip and eye, about 2 nostril diameters above upper lip; posterior nostril with raised rim, immediately before anterior margin of eye and above and behind anterior nostril. Eye about equal to snout in adults. Mouth small and oblique; reaching to below middle of eye in male and below anterior quarter of pupil in female; teeth in upper jaw conical, outer row teeth close-set; second row of smaller teeth anteriorly; lower jaw teeth similar to upper jaw teeth, but with outer row teeth more wide-set; tongue tip truncate to slightly emarginate. Gill opening restricted to pectoral base; gill rakers short. At least 5 lateralis system open head pores.
Body partly scaled; vertically elongate scales behind pectoral base on sides of belly usually continuous with posterior body scales; Body scales largely ctenoid; lateral line absent; longitudinal series 29-47. Pectoral base, prepelvic area and midline of belly naked; posterior portion of body completely scaled; scale coverage becoming reduced anteriorly, with naked patch beginning below and near front of second dorsal fin, with scale coverage narrowest between dorsal fins and below posterior end of first dorsal fin, coverage broadening anteriorly near pectoral insertion; belly naked or sometimes scaled on sides.
Two dorsal fins; first dorsal fin long based with low rounded margin; membrane from end of first dorsal fin reaching near, but not to second dorsal origin; dorsal and anal fins typically with first ray unsegmented. Pectoral fin with rounded margin, reaching to below middle of first dorsal fin. Ventral fins fused to form large cup-shaped disc reaching to just beyond middle of first dorsal fin, well short of anus.

Size

Males reaching 3.6 cm SL, and regularly to 2.5 cm, females to 4.1 cm SL, and regularly to 3.0 cm.

Colour

Translucent pale brown with scattered, irregularly shaped black spots dorsally on body; 2-3 vertical black bars below first dorsal fin, extending onto sides of belly; midside with 4 more-or-less rectangular large black spots, first below second dorsal origin and fourth at posterior end of caudal peduncle; smaller, vertically elongate or rounded black spot, midway between each pair of rectangular spots; belly white to silvery; pectoral base pale brown to yellow, with small black spot dorsally near base of fin rays. Head with many scattered melanophores; thin black bar from ventral margin of eye to posterior end of jaws; diffuse grey spot behind eye and another at dorsoposterior margin of operculum; cranium behind eye with dense subcutaneous concentration of melanophores. Fins transparent. First dorsal fin with small dark spots forming 23 horizontal black stripes, males with intense black pigment, usually forming black bar between last 2-3 dorsal spines, pale to grey posteriorly in females.; second dorsal with dark spots forming 3-5 oblique stripes; anal fin without pigment; caudal fin with 2-4 wavy black bars; pelvic and pectoral fin with scattered black flecks.

Biology

Likely to be oviparous, benthic spawners.

Etymology

The species name honors Peter Last, CSIRO Division of Fisheries, Hobart, who supplied much of the Tasmanian material of this species.

Species Citation

Tasmanogobius lasti Hoese, D.F. (1991). A revision of the temperate Australian gobiid (Gobioidei) fish genus Tasmanogobius with a comment on the genus Kimberleyeleotris. Mem. Mus. Vict. 52(2): 361–376 figs 1–10 [366, figs 5–7].
Princetown, VIC.

Author

Martin F. Gomon

Scary's Tasmangoby, Tasmanogobius lasti Hoese 1991

References


Hoese, D.F. & Larson, H.K. (1994). Family Gobiidae.  pp. 781–810, figs 690–714 in Gomon, M.F., Glover, J.C.M. & Kuiter, R.H. (eds) The Fishes of Australia's South Coast.  Adelaide : State Printer 992 pp. 810 figs [807].

Last, P.R., Scott, E.O.G. & Talbot, F.H. (1983). Fishes of Tasmania.  Hobart : Tasmanian Fisheries Development Authority 563 pp. figs [454] (as T. sp. 2).

Quick Facts


CAAB Code:37428262

Habitat:freshwater streams and estuaries

Max Size:4.1 cm SL

Native:endemic

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