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Brian1946's avatar

What are some species of salt-water, fresh-water, and both-water fish?

Asked by Brian1946 (27763points) August 30th, 2010

What are some species of fish that can live in both salt and fresh water?

If you can name such a fish, which type of water was it restricted to before it evolved?

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8 Answers

Winters's avatar

The only one I can think of is Salmon, hatches in freshwater, lives its life in saltwater, then returns to freshwater to drop off its eggs. But it dies shortly thereafter.

lucillelucillelucille's avatar

A friend had told me about a shark he saw in brackish water.
I’m sure there is more info out there somewhere on this ;)

Brian1946's avatar


Your friend might have seen a bull shark.

Nullo's avatar

The American Eel is a freshwater fish (?) that spawns in the Sargasso Sea, which is a bit northeast of Cuba.

Mat74UK's avatar

Also these two come to mind
European Eel. Anguilla Anguilla
Sea trout. Salmo Cambricus

cowboyBob64's avatar

three-spined stickleback

El_Cadejo's avatar

Most people dont realize this, but both mollies and guppies can be acclimated over to salt water.

I used to keep mollies in my reef tank, they make excellent algae cleaners and are dirt cheap

downtide's avatar

Salmon. They’re born in fresh water, go out to sea to mature, and then they return to the place they were born to mate. I believe some species of trout do the same.

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