Why do swordfish fight each other?

Answer 1

Swordfish often fight each other for the right to mate with females or for territory. These fish are very large and very territorial and will often even fight with humans who enter their area.

Answer 2

Siamese Fighting Fish fight because most of the fish are territorial. If another fish/Siamese Fighting Fish comes in their territory, the Siamese Fighting Fish will strike and start fighting until one surrenders, is almost dead, or is dead. This also happens when Siamese Fighting Fish are mating. Sometimes the female/male is too old or too young and if they are put together, they will start fighting. When mating, the female has to hide in plants or behind rocks so that the male will not nip on her fins.
yes because they smell

Answer 3

they fight for dominence and also to show that, there tanke is there's not your's.

Answer 4

they use there speed to fight because they can move away from the other fish or to go behind them