Depending on the damage, a fin can grow back provided the fish is cared for properly and the water is clean
Yes some animals like lizards can regenerate their body parts like tail.
Fish can regrow fins (they never quite look the same, but they do regrow, usually pretty fast if your water quality is good and there is no complication with either fungal or bacterial infection). They cannot, however, regrow body parts. If part of the ghost knife fish's tail as well as 'fin' has been chomped off, it can heal, but will never regrow.
No. Lobsters can regrow claws and legs, but the tail is too invovled with the lobster's internal organs to effectively regrow.
it wags its tail and barks
No snakes don't regrow their tails, that's a lizard thing.
An earthworm can regenerate its head and its tail. An example is, if you go dig a earthworm out from the ground and chop it in half then its head will grow a new tail and the tail will grow a new head. Eventually there would be two earthworms. If you cut an earthworm into four piece's then after a few weeks or even months there would be four earthworms. So if you think that if you cut an earthworm you are killing it you are wrong. But if you cut an earthworm into too many piece's, example twelve then you will kill the worm, and after that there is no way to bring it back to life.
Contrary to popular belief, if you cut a worm in half, it will not regrow into two separate worms. The part with the head may survive and regenerate its tail, but the other part will likely die. It's not recommended to cut worms in half as it can cause harm to them.
No, you cannot get a full lizard to regenerate from the severed end portion of a shed tail. However, the rest of the lizard can regrow its lost tail.
No, raccoons do not have the ability to regenerate their tails. Once a raccoon loses its tail, it will not grow back.
The tail feathers will grow back over time.
The hag-fish often contorts itself into a simple knot to effect feeding.
Techically no, but it depends on how it lost the tail. The fins and tails are fully regeritive tissue and should grow back virtually scarless, unless the damage is all the way to the base of the tail. There wouldn't be anything for the tail to regrow from. The damage would be permanent...