Trimma pentherum Winterbottom & Hoese, 2015
Mourning pygmygoby
photo by Winterbottom, R.

Family:  Gobiidae (Gobies), subfamily: Gobiinae
Max. size:  2.03 cm SL (male/unsexed)
Environment:  reef-associated; marine; depth range 0 - 24 m
Distribution:  Western Pacific: Australia (the Great Barrier Reef) to Tonga and north to the South West Islands of Palau.
Diagnosis:  Dorsal spines (total): 7-7; Dorsal soft rays (total): 8-8; Anal spines: 1-1; Anal soft rays: 8-8. This species is distinguished by the following characters: a concave bony interorbital which is less than half pupil-diameter in width; slight or no groove posterodorsal to eye; presence of scales in the midline of the predorsal region; absence of opercular scales; the fifth pelvic ray is branched once dichotomously and more than 80% the length of the fourth ray; adults with the epaxial musculature reaching anteromedially to a point in line with the posterior margin of the eye; elongated spines in first dorsal fin absent (the second spine is longest, reaching to the region of the base of the second dorsal-fin spine); scale pockets are strongly outlined by melanophores and chromatophores; with a dark, vertical bar on the base of the pectoral fin; 6 grey saddles across the dorsum (Ref. 100726).
Biology: 
IUCN Red List Status: Least Concern (LC); Date assessed: 07 September 2021 Ref. (130435)
Threat to humans:  harmless


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