It can be between 15-20 inches long
The dorsal fin is the fin on the back of a fish, for example the typical triangular fin on the back of a shark is its dorsal fin.
Dorsal fin
dorsal fin
An orcas dorsal fin (the fin on the back of a aquatic mammal, so times on a shark) can get to be 6 feet tall.
Dorsal
dorsal fin
They allow the shark to swim. A shark with no fins would be unable to swim. Any individual fin provides steering and propulsion depending on exactly which fin you're talking about. The dorsal fin (the one on top of the shark that sticks up above the water in any cartoon about a shark) is mainly for steering.
A great white dorsal fin does always stay upright in the water. The fin is what helps the shark swim.
dorsal, in anatomy at least, means towards the back side of the body. the reason why fish have a dorsal fin is because its on their back, like a shark fin.
The dorsal fin of a dolphin is usefu,l because it can control the balance when a dolphin is swimming.It can also be useful for signs of dolphins and not sharks because the dorsal fin of a dolphin and a shark is slightly different.
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The grey nurse shark has fins, not limbs. They are Pectoral, Dorsal, Second Dorsal, Anal, and Caudle fin (tail).