The cute little creatures called salmon are the fish that swim up stream! Bears love them. :0)
salmon
To mate and lay their eggs.
samon swim up river to lay their eggs then they die
The answer is smelt. Caught in rivers emptying into Lake Superior by net when they swim up stream to spawn.
Fish just swim around until the owner wakes up and feeds him/her/them.
swim up
they are stressed or sick
All fish have swim bladders. The bladder is what enables them to maintain buoyancy in the water. Without it, they would have to constantly swim up, much like birds have to fly up in the air. It is too much work to constantly swim up, so using a swim bladder, fish do not have to exert as much effort, and preserve energy.
Yes almost all fish have swim bladders it helps them go up and down. Gold fish can get flip over disease involving the swim bladder
Up and down. All marine mammals swim with vertical motions, and fish swim with horizontal motions.
they lay eggs up-stream so that other fish cant eat there eggs.A very cool adaptation is that they can survive in both fresh and salt water, which not many other species of fish are able to do.
The sailfish it can swim up to 68 mph
swim bladder