Latchet, Pterygotrigla polyommata (Richardson 1839)


Other Names: Butterfly Gurnard, Flying Gurnard, Lachet Gurnard, Pastry, Sharpbeak Gurnard, Sharp-beaked Gurnard, Spiny Gurnard, Spinybeak Gurnard

A Latchet, Pterygotrigla polyommata. Source: Rudie H. Kuiter / Aquatic Photographics. License: All rights reserved

Summary:
A reddish gurnard becoming silvery below, with red to brownish blotches below each dorsal fin,  purplish pectoral fins purplish with white speckles on the outer surface, and the inner surface blue to purple with broad transverse olive to bright yellow bands or rows of spots, and two large white edged black spots basally; red dorsal and caudal fins, a white anal fin, and pinkish pelvic fins.

Cite this page as:
Bray, D.J. 2017, Pterygotrigla polyommata in Fishes of Australia, accessed 15 Dec 2018, http://fishesofaustralia.net.au/home/species/3759

Latchet, Pterygotrigla polyommata (Richardson 1839)

More Info


Distribution

Widespread in southern Australia, from about Sydney, New South Wales, southwards around Tasmania and westwards to south of Shark Bay, Western Australia. Elsewhere, the species occurs off the northern coast of the North Island, New Zealand. 
Inhabits sandy or muddy areas, and enters shallow estuaries in southern Tasmania.

Features

Dorsal fin VII-VIII, 12; Anal fin 12; Caudal fin 11; Pectoral fin 12+3; Pelvic fin I, 5; Lateral line scales 63-70.
Body of moderate depth (23-28% SL, excluding rostral spines) and length, thick, tapering posteriorly to slender caudal peduncle. Head of moderate size (31-38% SL), prominent, rectangular in cross section, encased in bone; profile of snout in front of eyes straight to slightly concave; eyes large (23-26% HL excluding rostral spines), interorbital sharply depressed; mouth small (upper jaw length 38-42% HL), horizontal; teeth granular, band in each jaw; long spines on opercula, above pectoral fin bases and on bony process on each side of dorsal fin origin; no groove above and behind each eye; bony rostrum enclosing upper lip with a pair of long, forward directed spines.  
Scales tiny, cycloid, somewhat embedded, in approximately 110-120 diagonal rows, covering all of body except area just behind head and anterior portion of belly; lateral line smoothly curved, closer to dorsal profile anteriorly than to lateral midline; lateral line scales larger than embedded scales, without spines; scales only along base of first dorsal fin forming row of broad bony bucklers without spines.
Dorsal fin in two parts, first tall and curved, second elongate and slightly shorter, but of more even height; anal fin similar to second dorsal; caudal fin forked. Pectoral fins prominent, tip reaching distinctly beyond ventral fin tips; lower three rays thickened and not interconnected by membranes. Pelvic fins prominent, reaching to or slightly past origin of anal fin.

Colour

Reddish becoming silvery below, with red to brownish blotches below each dorsal fin, red dorsal and caudal fins, a white anal fin, and purplish pectoral fins purplish with white speckles on the outer surface, and the inner surface blue to purple with broad transverse olive to bright yellow bands or rows of spots, and two large white edged black spots basally; pelvic fins pinkish.

Fisheries

This species is taken fairly frequently by trawlers and is often sold in fish markets, but has a flesh of somewhat lesser quality compared with the closely related red gurnard.

Species Citation

Trigla polyommata Richardson 1839, Proc. Zool. Soc. Lond. 7: .96. Type locality: Port Arthur, TAS (as Van Diemen's Land).

Author

Bray, D.J. 2017

Resources

Australian Faunal Directory

Latchet, Pterygotrigla polyommata (Richardson 1839)

References


Allan, R. 2002. Australian Fish and How to Catch Them. Sydney : New Holland Publishers (Australia) 394 pp. 

Coleman, N. 1980. Australian Sea Fishes South of 30ºS. Lane Cove, NSW : Doubleday Australia Pty Ltd 309 pp. 


Gomon, M.F. 1994. Family Triglidae. pp. 494-505 figs 442-450 in Gomon, M.F., Glover, C.J.M. & Kuiter, R.H. (eds). The Fishes of Australia's South Coast. Adelaide : State Printer 992 pp. 810 figs. 


Gomon, M.F. & Last, P.R. 2008. Family Triglidae. pp. 508-514 in Gomon, M.F., Bray, D.J. & Kuiter, R.H. (eds). Fishes of Australia's Southern Coast. Sydney : Reed New Holland 928 pp. 



Hutchins, J.B. & Swainston, R. 1986. Sea Fishes of Southern Australia. Complete field guide for anglers and divers. Perth : Swainston Publishing 180 pp. 

Kuiter, R.H. 1993. Coastal Fishes of South-eastern Australia. Bathurst : Crawford House Press 437 pp. 


May, J.L. & Maxwell, J.G.H. 1986. Field Guide to Trawl Fish from Temperate Waters of Australia. Hobart : CSIRO Division of Marine Research 492 pp. 


Pollard, J. (ed.) 1980. G.P. Whitley's Handbook of Australian Fishes. North Sydney : Jack Pollard Publishing Pty Ltd 629 pp. 

Richardson, J. 1839. Account of a collection of fishes from Port Arthur, Van Diemen's Land. Proceedings of the Zoological Society of London 7: 95-100 

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

Quick Facts


CAAB Code:37288006

Depth:10 - 484 m

Habitat:Sandy & muddy areas

Max Size:61 cm

Species Image Gallery

Species Maps

CAAB distribution map