Well, if you mean a Siamese fighting fish (betta splendens) the male are always bigger than the females, and usually the males are more colorful. The males have large tails, as the femaleshave small tails and dorsal fins.
The flaps on a fish are called fins, which help the fish to maintain balance, steer, and move through water. There are different types of fins on a fish, such as dorsal fins, pectoral fins, pelvic fins, anal fins, and caudal fins.
I guess you mean "Anal fin". If so, the answer is "yes fish do have an anal fin."
They are on the Ventral side, but you probably mean the Pelvic fins and possibly anal fin, depending on the fish species These links provided below may help you :)
To swim..? If you mean the fin on top of their bodies then it helps stabilize them.
It means that something ripped their tails or fins, most likely the teeth of another fish.
The most common Asian style fish that people get tattoos of are the Koi fish. Koi fish tattoos symbolize good fortune.
If you mean "crawfish", then the answer would be bigger fish like catfish.
Although I'm not sure what you mean by "deep" body, Betta fish, or Siamese Fighting Fish, or Rumble Fish (if you're S.E. Hinton) are thin, brightly-colored (domestically bred males tend to be more colorful), and have long, wavy fins.
Bettas are slow retiring fish. They do not move around much normally. Silvery coloured "pectoral fins" are quite common.
gills for breathing and fins for swimming if thats wat u mean.
Male betta fish tend to be very aggressive. They are best alone unless theres a special type of specie they can get along with. They like to have personal space. And as using fighter fish you probably refer to Siamese fighting fish which is betta fish