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.
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.
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...
Yes, salamanders can regenerate their tails and legs. See related link
It allows the lizard to regrow its tail.
No, a raccoon cannot regenerate a missing tail.