it helps it cut through the water
The fin on the top/back of all fish is called the "Dorsal Fin."
Dorsal fin
It's top fin.
A dorsal fin, (or top fin), is used to steer the dolphin, and to help it balance.
it is the fin on the top near the back of the fish
pushs the fish to move
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?
The Dorsal Fin is located on the "back" of a fish. Where the spine is.
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
A fish has several different types of fins. There are the pectoral fins, located beneath the operculum (gills). There is the pelvic fin, located at the bottom of the fish, below the pectoral fin. There is the anal fin, which i located behind the anus, and there is the dorsal fin as well. It is located on top of the fish.
The pectoral fin mantains how deep the fish can go.
The "DORSAL" fin is the fin fish have on the top of their back. It is often shaped a bit like a triangle or sail.