they are stressed or sick
Side to side
They swim up down left to right down the toilet. no fish dont exersice
false. Fish move their tails side to side to aid motion. However, whales were once land animals and their spines are built differently. To be able to move with that physical set up, their tails move up and down.
Up and down. All marine mammals swim with vertical motions, and fish swim with horizontal motions.
Yes, Tuna - as all fish and sharks do - move their tails side to side when swimming. Whales and dolphins however, move their flukes up and down.
swim bladder
Up and down. I've also noticed that mammals, such as whales and dolphins, beat their tail up and down, while fish, like sharks, beat their tail side to side. Hope this helps!
the movement of fish is moving side to side up and down
to move up and down in water
to move up and down in water
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
A fish's 'swim bladder' can be inflated or deflated depending on if the fish wants to go up or down in the water.