Thryssa polybranchialis Wongratana, 1983
Humphead thryssa
Thryssa polybranchialis
photo by Randall, J.E.

Family:  Engraulidae (Anchovies), subfamily: Coiliinae
Max. size:  19.1 cm TL (male/unsexed)
Environment:  pelagic-neritic; marine
Distribution:  Indian Ocean: eastern and western coasts of India.
Diagnosis:  Dorsal spines (total): 0-0; Anal spines: 0-0; Anal soft rays: 35-39. Belly with 15 to 17 + 9 or 10 = 25 to 27 keeled scutes from isthmus to anus. A distinct hump at nape; tip of snout above upper rim of eye. Maxilla short, not quite or only just reaching to edge of gill cover; first supra-maxilla minute, oval. A dark blotch behind upper part of gill opening.
Biology:  Presumably schooling. Undoubtedly confused with other species in the past. More data needed.
IUCN Red List Status: Data deficient (DD); Date assessed: 12 February 2018 Ref. (130435)
Threat to humans:  harmless


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