it is called the Caudal Fin
The fin on the top/back of all fish is called the "Dorsal Fin."
its called the dorso fin
Yes, it is called a fin.
fin fin friends
A fish's tail is called a caudal fin.
Those are the flippers, or 'pectoral' fins.
It's the ventral fin and My best Guess to it's purpose is that it helps stablize the forward movement in the fish, bit like the skegs on kayaks. possibly gives some direction control, like a rudder, and streamlining as well
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.
The caudal fin of a fish, also known as the tail fin, is primarily responsible for propulsion and steering. It generates forward movement by pushing water backwards when the fish moves its tail side to side. The shape and size of the caudal fin can affect the speed and agility of a fish.
The tail fin of a fish (the caudal fin) is a fish's means of propulsion through the water.
The female has a triangular anal fin. In the male this fin is elongated into a long point. This fin carries milt (sperm) like a penis and is called a "gonopodium".
I call it a sketch of a fish's fin. I am sorry if this does not help, but unless there is a fancy name for it I'm pretty sure its a sketch of a fish's fin. Answer: I call it a sketch of a fish's fin too but on my math hw thing it says u call it a scale drawing. how dumb is that?