it's essentially a limb with a tough skin, and controlled by very powerful muscles, so you wouldn't want to be clouted by it.
Or have the other end of the animal bite you...
a tail
yes
Their tail and teeth.
moving their tail
Dolphins paddle by swishing their tail up and down or side to side.
Dolphins do have a strong tail with strong kick. That is showcased in many aquariums when they perform tail-walking above water or jumps.
silk as the cover
Yes. Most dolphins can't survive without a tail because they need a tail to swim, they would most likely drown without a tail, but that doesn't mean it's completely hopeless. If Winter the dolphin can survive without a tail, another dolphin can survive too, as long as they put their fighting spirit to use for survival
Hard.
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!
You see their tail hear and the tail there you can't see them at all
it is like a trangiler