Odonteleotris macrodon (Bleeker, 1853)
Gangetic sleeper
photo by Wilson, D.

Family:  Butidae (Gudgeon gobies)
Max. size:  27.8 cm SL (male/unsexed)
Environment:  demersal; freshwater; brackish; marine
Distribution:  Indo-West Pacific: India, Myanmar, Thailand, Malyasia, Indonesia, and questionable in Australia.
Diagnosis:  Dorsal spines (total): 7-7; Dorsal soft rays (total): 10-10; Anal spines: 1-1; Anal soft rays: 8-8. This species is distinguished from all other species of Butidae by the following set of characters: upper and lower jaws with enlarged canine teeth (5 and 12, respectively); canines are in the outermost tooth row in the upper and anterior lower jaw, while canines are placed in the inner tooth row in the posterior lower jaw; upper jaw ending below center of the eye; interorbital sensory pore D paired with wide interval; fourth infraocular transverse row of sensory papillae crossed with a longitudinal row on the cheek; longitudinal scales 103; transverse scales 32; predorsal scales 63; transverse scales at caudal peduncle 21; circumpeduncle scales 39; D VI-I,10; A I, 8; pectoral-fin rays 17; predorsal length 38.2% of SL; body depth at anal-fin origin 18.4% of SL; eye diameter 3.3% of SL. Colouration: unpaired fin rays variegated by small blackish spots; a red spot on the upper part of the caudal-fin base when fresh (Ref. 129074).
Biology:  Found in rivers and estuaries (Ref. 4833).
IUCN Red List Status: Least Concern (LC); Date assessed: 01 June 2020 Ref. (130435)
Threat to humans:  harmless


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