yes, they do it is next to their spiny dorsal fin.
Because that's ahow god made them
The Arctic grayling.
I think that the largest fin of a perch is the first dorsal fin, the one that is located on the top of the fish and is spiny.
The fin on the back of an orca is called the dorsal fin.
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 - 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 female orca's dorsal fin is curved and the males dorsal fin is straight
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.
No, a dorsal fin from a fish is on its back area.
The fin on the top/back of all fish is called the "Dorsal Fin."
Some sharks have a second dorsal fin, it's between the main dorsal fin in the middle of the back, and the tail. Not all fish have a second dorsal fin.