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The 23 pages that link to Freshwater fish, each with the reason it gives.

• Salt glandCompared with: These fish face water gain and salt loss, the opposite pressure from many marine animals.

• Nile perchNarrower topic: Nile perch inhabits freshwater systems across much of its native range.

• Marine fishCompared with: Their habitats differ in salinity, though some species move between fresh and salt water.

• CyprinidaeNarrower topic: Most cyprinids are adapted to inland freshwater habitats.

• Mercury in fishRelated: Local freshwater contamination can make some catches a distinct source of dietary mercury.

• CichlidNarrower topic: Cichlids are a notably diverse lineage within freshwater ecosystems.

• EuryhalinityBroader topic: Many freshwater fish are stenohaline and cannot tolerate seawater exposure.

• Northern pikeNarrower topic: The species lives in inland waters rather than marine habitats.

• Freshwater food webBroader topic: Fish occupy varied predator and prey roles across freshwater food webs.

• George Albert BoulengerBroader topic: Boulenger’s work on African freshwater fishes helped document regional diversity.

• GuppyNarrower topic: Guppies inhabit freshwater streams, pools, and other inland waters.

• River ecosystemBroader topic: Fish abundance and migration patterns are widely used to track river health and connectivity.

• TroutNarrower topic: Trout’s usual habitat places them within this broad ecological group.

• BowfinNarrower topic: The bowfin is a native predator in freshwater habitats across eastern North America.

• EsoxNarrower topic: Esox species are predators within lakes, rivers, and other freshwater habitats.

• Murray codNarrower topic: Murray cod is adapted to inland rivers rather than marine waters.

• BothriolepisNarrower topic: Many Bothriolepis species are associated with freshwater or estuarine environments.

• GouramiNarrower topic: Gouramis belong to this broad ecological group.

• TambaquiNarrower topic: Tambaqui is a large representative of tropical freshwater fishes.

• BurbotNarrower topic: Burbot differs from most gadids by remaining in freshwater throughout its life.

• PumpkinseedNarrower topic: The species lives in lakes, ponds, and slow-moving freshwater habitats.

• Wels catfishNarrower topic: The Wels catfish inhabits inland rivers, lakes, and reservoirs.

• Wrestling halfbeakNarrower topic: The species inhabits freshwater environments across Southeast Asia.