The fin on the top/back of all fish is called the "Dorsal Fin."
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
Dorsal fin
it is called the Caudal Fin
It's top fin.
its called the dorso fin
Yes, it is called a fin.
it is the fin on the top near the back of the fish
fin fin friends
A fish's tail is called a caudal fin.
The Dorsal Fin is located on the "back" of a fish. Where the spine is.
Dorsal - Top of the fish Caudal - The "tail fin" Anal - Rear most fin on the bottom of the body Pelvic - Front set of finds on the bottom of the body Pectoral - Right behind the gills on the side of the fish's body
Those are the flippers, or 'pectoral' fins.