Slender Flounder, Pseudorhombus tenuirastrum (Waite 1899)

Other Names: Deepwater Flounder, Deep-water Flounder, Threespotted Flounder

Slender Flounder, Pseudorhombus tenuirastrum. Source: Australian National Fish Collection, CSIRO. License: CC by Attribution-NonCommercial

A greyish-brown flounder with three ocelli above and below the lateral line, and smaller dark rings and blotches scattered on body and median fins. 

Cite this page as:
Bray, D.J. 2020, Pseudorhombus tenuirastrum in Fishes of Australia, accessed 15 Apr 2024,

Slender Flounder, Pseudorhombus tenuirastrum (Waite 1899)

More Info


Off Fraser Island, Queensland, to Flinders Island, Tasmania, and west to Kangaroo Island, South Australia. Elsewhere the species occurs in the east-Indo-west Pacific.
Inhabits sandy and muddy bottoms.


Dorsal fin 74-80; Anal fin 58-61; Pectoral fin (eyed side) 11-12. 
Body elliptical, depth 2.1 to 2.3 times in SL; head length 4.1 to 4.4 times in SL; upper profile of head with shallow notch in front of upper eye; snout slightly protruded, shorter than eye diameter, upper-eye diameter 3.8 to 5.2 times in head length. Maxilla extending almost below middle of lower eye; upper-jaw length 3.9 to 4.6 times in head length. Teeth in both jaws small, close-set, no enlarged canines. Gill rakers slender, rather elongate. 
Scales usually cycloid on both sides, but sometimes weakly ctenoid on anterior part of body on eyed side. 


A greyish-brown flounder with pale-centred dark spots, many encircled with bright yellow dots: four or five along the lateral line, six within both the upper and lower margins of the body, three to four pairs of similar spots between the lateral line and the spots along the margin of the body, and two spots on the caudal peduncle. All fins are patterned with dark wavy lines, the dorsal and anal fins have a series of dark spots midway between the base and outer fin margin, and there are two dark blotches on the base of the caudal fin.

Species Citation

Paralichthys tenuirastrum Waite 1899, Memoirs of the Australian Museum 4: 121, fig. 10, pl. 28. Type locality: between Port Stephens and Port Hacking, New South Wales, 20-52 fathoms.


Bray, D.J. 2020


Atlas of Living Australia

Slender Flounder, Pseudorhombus tenuirastrum (Waite 1899)


Amaoka, K. & Hensley, D.A. 2001. Paralichthyidae. pp. 3842-3862 in Carpenter, K.E. & Niem, T.H. (eds). The Living Marine Resources of the Western Central Pacific. FAO Species Identification Guide for Fisheries Purposes. Rome : FAO Vol. 6 pp. 3381-4218. 

Johnson, J.W. 2010. Fishes of the Moreton Bay Marine Park and adjacent continental shelf waters, Queensland, Australia. pp. 299-353 in Davie, P.J.F. & Phillips, J.A. Proceedings of the Thirteenth International Marine Biological Workshop, The Marine Fauna and Flora of Moreton Bay. Memoirs of the Queensland Museum 54(3) 

Marshall, T.C. 1964. Fishes of the Great Barrier Reef and Coastal Waters of Queensland. Sydney : Angus & Robertson 566 pp. 136 pls. 

Norman, J.R. 1926. A report on the flatfishes (Heterosomata) collected by the F.I.S. Endeavour, with a synopsis of the flatfishes of Australia and a revision of the subfamily Rhombosoleinae. Biological Results of the Fishing Experiments carried on by the F.I.S. Endeavour 1909-1914 5(5): 219-308 figs 1-15 

Norman, J.R. 1934. A Systematic Monograph of the Flatfishes (Heterosomata) Psettodidae, Bothidae, Pleuronectidae. London : British Museum Vol. 1 459 pp. 317 figs. 

Ogilby, J.D. 1912. On some Queensland fishes. Memoirs of the Queensland Museum 1: 26-65 2 figs pls 13-14 

Waite, E.R. 1899. Scientific results of the trawling expedition of H.M.C.S. Thetis off the coast of New South Wales. Memoirs of the Australian Museum 4: 1-132 figs 1-10 pls 1-31 DOI: 10.3853/j.0067-1967.4.1899.428

Quick Facts

CAAB Code:37460031

Depth:1-110 m

Habitat:Sandy & muddy areas

Max Size:25 cm SL

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CAAB distribution map