Humphead thryssa (Thryssa polybranchialis) is a ray-finned fish of the family Engraulidae. It inhabits marine (saltwater) waters in pelagic environments. This species can reach a maximum total length of 19.1 cm. With a trophic level of 3.4, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Data Deficient on the IUCN Red List.
Dorsal spines (total): 0; Anal spines: 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.: elongated; Cross section: compressed.
Behavioural data for Humphead thryssa is currently being reviewed.
Diet information for Humphead thryssa is currently being compiled.
Reproduction data for Humphead thryssa is currently being compiled.
Marine; pelagic-neritic. Tropical; 21°N - 4°N, 69°E - 90°E Indian Ocean: eastern and western coasts of India.
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