The fin on the top/back of all fish is called the "Dorsal Fin."
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 pelvic fin is in the bottom; toward the front side of the middle. The pectoral fin is on the bottom, in the front. The pectoral fin helps control the direction the perch moves. The pelvic fin also controls the direction it moves. The anal fin is in the bottom back side and helps the fish balance. The dorsal fins are on top, one in the middle one it the back and stabalize the fish and aid in sharp turns. The caudal fin, or the tail, is in the back and helps to propel the fish through the water.
The Snakehead fish is a freshwater predatory fish. it is native to Africa and Asia. They can be distinguished from other fish by being very long with a long fin on the top and slightly shorter fin on the bottom.
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
It's top fin.
it is the fin on the top near the back of the fish
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
The dorsal fin is located on the top of a fish's body, along its back. It helps with stability and maneuvering in the water.
The dorsal fin, and it's used to stabilize the dolphin while it's swimming.
it helps it cut through the water