They are spawning.
The fish they stole were Japanese Fighter Fish
yes all fish have gills.
no way! they cant because chinease fighter fish are semi aggresive and will fight with your other fish or if the other is to big the gold fish will eat him
there black
Mosquitos
A group of fish is called a school, shoal, draft, run, haul, or catch.
A shinigami, I suppose you would call him a fighter...
You Let Them Lay Egg In It
Placing a small mirror glass in front of your fighter fish will do the job
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
No they can not. Some people call a Betta splendens a Betta or a Siamese fighter or a Japanese Fighting Fish. They are all refering to the same species of fish. They come in both males and females and both are needed to produce any young.