There are certainly aquatic animals that can't swim, such as the clam, or the adult barnacle (and even then, the larval form of the barnacle does swim) but you wouldn't really call anything a fish if it couldn't swim. Fish swim.
I guess you could say a "shell fish". A barnacle is a shell fish and adult barnacles can't swim.
Trout cannot swim at sea.
No they can't because they need to have salt in the water. So no sea fish cannot swim in the river.
Freshwater fish would not survive the salinity of the sea for very long.
Salmon swim in the sea. Salmon are fish. Fish love water. The sea is water. Thus, salmon swim in the sea. Voila!
Sea Turtles swim in the sea because they eat fish.
Freshwater fish.
yes they do
Queer Fish That Swim in the Sea - 1898 was released on: USA: September 1898
Yes, a seahorse is a type of fish and it does swim.
yes they do
silver fish
no fish swims upright unless its xxxxxxxxxxxxxxxxxxxxxxxx kaveer999: the only fish to swim upright is the sea horse.