It depends on the species.
The tail fin of a fish (the caudal fin) is a fish's means of propulsion through the water.
On a dolphin and most fish the fin behind the dorsal fin is the tail fin. Some fish, such as knife fish, have no dorsal fin or tail fin. Dolphins of course are mammals, not fish.
It depends on what type of fish it is and if it has any blood vessels in its tail fin.
The tail fin acts as a rudder on a ship would.Turning the fish in whichever direction it wants to go in.
Female fish will have a v shape in there tail fin more than the males.
Force created by the tail and tail fin to propel the fish forward and steer the fish;
That depends on the type of fish, a Manta Ray is very different to a herring. However taking the traditional bony fish shape the fin with the greatest power is the tail fin as that concentrates the power form the muscles either side of the spine.
A fish's tail is called a caudal fin.
Yes, it is called a fin.
fin shape is 27 in
Those are the flippers, or 'pectoral' fins.
On a fish, it means a fin which is not its usual shape.