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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.
a dolphin can only swim up and down because its muscle structure and it spine are designed that way, if a dolphin were to swim side to side the muscle near its tail would swell damaging the spine if a shark or fish were to swim like a dolphin the same thing would happen eventually resulting in death.
yes, in the movie dolphin tail, the story was that adolphin lost its tail tphen got a robotic tail. it was based on a truestory.
the tail fins of a bottlenose dolphin are called flukes
if you've seen the movie. Dolphin tail. It moves up and down. :)
no it not
A tail
No it does not, it is born with a tail
Dolphin Tale
tail
its tail
Yes