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BiologyFound in rivers in clear to turbid water, usually over sand or gravel bottoms (Ref. 5259) and mud (Ref. 44894). Feeds on aquatic insect larvae and prawns (Ref. 5259, 44894) and small fishes (Ref. 12693). Larvae occur in the marine environment (Ref. 5259, 44894). Marketed fresh (Ref. 12693).