Facultative air-breathing in the genus ; Found in slow to median flowing watercourses, with clear to brown waters running over a sandy bottom and occurs in marginal or submerged aquatic vegetation .
Physical description for Hisonotus Laevior is currently being compiled.
Behavioural data for Hisonotus Laevior is currently being reviewed.
Freshwater; benthopelagic. Subtropical South America: Laguna dos Patos system in Brazil from southernmost tributaries of the laguna Mirim and canal São Gonçalo drainage to the tributaries of the northern rio Jacuí basin.
The following diseases are known to affect Hisonotus Laevior.
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