What is the plural of trout?

The plural of trout is trout.

Trout is an invariant noun: the singular and plural are identical.

All forms of trout

as a noun

base: trout
plural: trout

Trout in a sentence

Wetlands are important habitats for many species of fish, including catfish, bass, and trout.Amastan
Such fishes as carp and trout live in fresh water.unknown
I love to fish in the trout stream behind my house.unknown