Sandslope Goby, Psammogobius pisinnus Allen 2017

A Sandslope Goby, Psammogobius pisinnus, on Flynn Reef, Great Barrier Reef, Australia. Source: Masanori Onishi, in Allen (2017) Journal of the Ocean Science Foundation 26: Fig. 3. License: CC by Attribution

 A very small cryptic pale grey to whitish goby with three broad brown saddles on the upper sides, the first and darkest below the first dorsal fin, cheek and gill cover a mottled dark brown, and a whitish streak on the middle pectoral-fin rays.

Cite this page as:
Bray, D.J. 2018, Psammogobius pisinnus in Fishes of Australia, accessed 29 May 2024,

Sandslope Goby, Psammogobius pisinnus Allen 2017

More Info


Known from Flynn Reef on the northern Great Barrier Reef, Queensland, and New Britain, Papua New Guinea. Inhabits gentle reef slopes with mixed patches of live coral and mixed sandy and gravelly coral-rubble areas at depths of about 10–20 m.


Dorsal fin VI + I, 9-10; Anal fin I, 8-9; Pectoral fin 16-19; Pelvic fin I, 5; Caudal fin 12 (branched), 17 (segmented), 4-6 procurrent rays dorsally and ventrally; Gill rakers 0+6 (poorly developed); Vertebrae 27; Longitudinal scales 25-28; Transverse scales 6-7; Predorsal scales 5-7; Opercular scales 7-9; Cheek scales 8-13.
Third dorsal-fin spine sometimes with short, filamentous extension; all segmented dorsal- and anal-fin rays branched; all pectoral fin rays branched except uppermost and lowermost; each pelvic fin  ray branched twice except fifth ray with three branch points; pelvic-fin membrane fully developed, frenum relatively low and weakly developed. 
Scales ctenoid on body, except cycloid anteroventrally on breast, belly, and prepelvic area; head and nape scaled.


The specific name is from the Latin pisinnus (= small, little), in reference to the exceptionally small maximum size of this species in comparison to congeners.

Species Citation

Psammogobius pisinnus Allen 2017, J. Ocean Sci. Found. 26: 82, Figs 1-3. Type locality: Papua New Guinea, West New Britain Province, 1 km SW of Baronga Village, Sharon’s Island, 6°15.235’ S, 150°27.429’ E, 14–18 m.


Bray, D.J. 2018

Sandslope Goby, Psammogobius pisinnus Allen 2017


Allen, G.R. 2017. Psammogobius pisinnus, a new species of reef goby (Teleostei: Gobiidae) from Papua New Guinea and Australia. Journal of the Ocean Science Foundation 26: 80–85

Quick Facts

CAAB Code:37428445

Depth:10-20 m

Habitat:Reef associated

Max Size:2 cm SL

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