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.
Whales' tails move up and down when they swim, just like peoples' legs.
yes yes
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.
yes they do
Side to side
Whales swim using their fins and tails.
They use their tails to propel themselves backwards.
they move or swim with the fins and the move it from side to side
They move their tails up and down so fast that it makes swim fast.
They need their tails to swim.
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!
They catch it with their claws and teeth, and move around with there very large tails, to swim very fast.