It is usually a sign of poor water quality but there are other possibilities to the cause...
I guess you mean "Anal fin". If so, the answer is "yes fish do have an anal fin."
When your fish has a bloody fin, it means that it is either getting scraped by an unknown source in the tank, or, if there are other fish, that another fish is hurting the injured fish.
If you mean a fin like a fish fin, there is a word, but mostlly each one is different; Lā (fin). Anal fin, kuaalo. Caudal fin, hiʻu. Dorsal fin, kualā. Pectoral fin, etc. If you mean fin, like 'the end', it is pau'ana.
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.
The tail fin of a fish (the caudal fin) is a fish's means of propulsion through the water.
The fin on the top/back of all fish is called the "Dorsal Fin."
No, a dorsal fin from a fish is on its back area.
Most fish typically have 7 fins in total. - The dorsal fin. Prevents fish from rolling. - Adipose Fin. Makes the fish hydrodynamic. - Caudal Fin (tail). Propels the fish through the water. - Pectoral fin (x2). helps the fish steer and halt. - Pelvic fin. Helps the fish steer and halt. - Anal fin. Keeps the fish from rolling.
Most species of fish don't have an adipose fin.
There are literally hundreds of species of fish that have a red fin.
what do the dorsal and anal fins do for a fish
2 fins