Found in headwater stream with clear water, light to moderate water current and bottom consisting of stones, sand and moderate amount of vegetal debris . Feeds most frequently on microcrustaceans (Cladocera and Copepoda), insect larvae (Chironomidae), adult insects and plant fragments .
Distinguished from most species of Astyanax by the vertically elongated humeral spot, slightly expanded above the lateral line to posterodorsal margin of opercle, followed by a midlateral dark stripe expanded from the humeral region to the median caudal-fin rays, maxilla with 2-5 teeth (usually 3) and anal fin with 15-18 branched rays .
Behavioural data for Astyanax Totae is currently being reviewed.
Freshwater; benthopelagic. Tropical South America: Rio Cascata of the upper rio Iguaçu basin in Brazil.
The following diseases are known to affect Astyanax Totae.
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