Eleutheronema tridactylum (Bleeker, 1849)
Threefinger threadfin
Eleutheronema tridactylum
photo by Motomura, H.

Family:  Polynemidae (Threadfins)
Max. size:  25 cm SL (male/unsexed)
Environment:  pelagic-neritic; brackish; marine
Distribution:  Western Pacific: known only from Thailand, Malaysia, and western Indonesia.
Diagnosis:  Dorsal spines (total): 9-9; Dorsal soft rays (total): 13-14; Anal spines: 3-3; Anal soft rays: 14-15. Pectoral filaments 3; fin membranes uniformly brown like all other fins. Vomer lacks deciduous tooth plates on both sides throughout its life history. Posterior part of maxilla shallow, 2-3% of SL. Long tooth plate extension onto lateral surface of lower jaw, 9-10% SL (Ref. 41639).
Biology:  Too small to be of major commercial importance (Ref. 57343).
IUCN Red List Status: Data deficient (DD); Date assessed: 04 February 2009 Ref. (130435)
Threat to humans:  harmless


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