Simipercis trispinosa Johnson & Randall, 2006
Threespine grubfish
Threespine grubfish
Simipercis trispinosa
photo by Randall, J.E.

Family:  Pinguipedidae (Sandperches)
Max. size:  13.5 cm SL (male/unsexed); 10 cm SL (female)
Environment:  benthopelagic; marine; depth range 51 - 170 m
Distribution:  Western Pacific: Australia.
Diagnosis:  Vertebrae: 30-31. This species is distinguished in having 3 dorsal spines; a low naked fleshy nuchal crest ; dorsal angle of opercular bone broad, not forming a distinct exposed, pointed spine. It also has the following features: vomer and palatines edentate; subopercle and preopercle entire; 10 abdominal and 20-21 caudal vertebrae; scales including those on head and pelvic region large and ctenoid; interorbital with a single row of large scales, extending to, or just beyond anterior margin of eye; suborbital scales reaching a vertical between anterior margin of pupil and anterior margin of eye; and, head and body moderately compressed (body width 1.3- 1.55 in depth in adults) (Ref. 59348).
Biology: 
IUCN Red List Status: Not Evaluated (N.E.) Ref. (130435)
Threat to humans:  harmless
Country info:  Type locality, east of Noosa, Queensland, 104 m (holotype of Simipercis trispinosa, 11.4 cm SL). Known from the demersal trawl grounds between Swain Reefs, Qld (22º06'S, 153º02'E) and Manly, NSW (33º40'S, 151º26'E), 51-170 m. It is observed that a strong correlation between increased depth of capture and decreasing latitude across the range of the species exists. Specimens from near the northern range extremity, in the southern Great Barrier Reef region in considerably greater depths (112–170 m) than those at the southern end, in New South Wales (51-80 m), centrally, off the Sunshine Coast in southern Queensland in intermediate depths (98-123 m). Most of these trawl catches included several males in excess of 110 mm SL with prominent fin markings and well-developed caudal-fin filaments (maximum recorded size 135 mm SL), among a larger group of smaller females, ranging from about 60-100 mm SL (Ref. 59348).


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