they don't get tired because there designed to swim.
to swim
Thats how they swim
they swim
no,but they have oil rich livers.It prevents them from sinking when they are not swimming. but some fishes have swim bladders. ex:guppies,goldfish..........
Yes, all whales are fishes because they swim like fishes.
separate vertebrate
Yes they can swim.
salmon
they swim not run
Yes. Fins, a swim bladder, the composition of their bones, and their muscles all help a fish to swim.
Nope. Piranhas are freshwater fishes.
they die