That's the lower fin in front of the tail and right behind the anus.
The anal fin is the one just in front of the fishes anus.
what do the dorsal and anal fins do for a fish
No. If you exclude the length of the tail (caudal) fin in some male guppys, under normal circumstances, female guppys grow to around double the size of male guppys
A female usually has a fan shaped anal fin( anal fin is on the bottom of the fish), and a male's anal fin is pointy, or "rod shaped".
I guess you mean "Anal fin". If so, the answer is "yes fish do have an anal fin."
An anal fin is the single fin under the fishes tummy towards the tail end. The male platty has a pointed anal fin (this is called a gonopodium and performs like a penis) the female has a triangular anal fin.
It's the fin closest to the butt.
Pertaining to, or situated near, the anus; as, the anal fin or glands.
For stability
Behind the anal fin.
The tail fin is called the caudal fin and the fin near the rear on the bottom side is called the anal fin.
The one closest to the bum.