1. Any fish species that lives in freshwater environments such as rivers, lakes, streams, and ponds, as opposed to saltwater environments
Trout and bass are popular freshwater fish for anglers.
Truta e robalo são peixes de água doce populares entre os pescadores.
2. Fish adapted to survive in non-saline water with low salt concentration
Freshwater fish have specialized kidneys to regulate water intake.
Os peixes de água doce possuem rins especializados para regular a ingestão de água.