fish

[strann]

Are there any fish, other than the salmon, that can survive in both salt and fresh water?

[Mr Veritas]

Eels do, I think?

[Noweia]

Such fish are termed 'diadromous' as they can exist in either salt- or freshwater.

You can search on Google for them. A couple of links here talk about a few species:
http://www.fisheries.is/the-main-species/diadr omous-fish/
http://www.edf.org/article.cfm?contentID=4448

[spikebt]

Bull sharks

[hammerman]

I have kept black mollies in FW and marine aquariums. Scats, monos and some puffers will do too as will bumblebee gobies. Most livebearing tropical fish such as guppies and swordtails will appreciate salt in their water.

In mu local river which runs from Newhaven to Lewes (river Ouse) in East Sussex has sea trout, bass, mullet, dabs and a few other sea fish in among the dace and cream and carp.

[hammerman]

That meant to say *Bream* above.....doh !!!!