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BiologyPrefers rivers in overgrown backwaters where the current is not too strong. Feeds on fish and crustaceans. Its flesh is esteemed for its very fine flavor. Is reported to be nocturnal. Frequently captured with nets, the males are difficult to release from the nets because of its strong dorsal spine bordered with denticles (Ref. 27188). During reproduction, the mandibular barbels and dorsal spine of the male change, and a copulatory organ appears at the anterior level of the anal fin. Fertilization is internal, the female being capable of keeping the spermatozoids inserted in the epithelium of her genital tract (Ref. 35381).