Fish.
They are found in oceans, lakes, and rivers.
Betta fish was first found in the rivers of Thailand.They are basically river water fish.......
Koi fish are found in Japanese garden ponds.
there is salt in the sea, not in rivers
Often it is the Koi fish.
there are 99 900.000 fishes found in rivers in different parts of world
Japanese
Piranhas are found in South American rivers. They are found in the Amazon basin and in the rivers of Guyanas. They have very sharp teeth, and they eat meat.
The Piranha is the name of several species of carnivorous fish that are mainly found in Amazon rivers.
In any of the lakes or rivers in Ireland, or in the seas around its coast.
The alligator gar is found in rivers and lakes of the southern U.S.