This is a Siamese fighting fish, Betta splendens. (Photo courtesy of Ivabalk, Pixabay) (CN) — Famous for its aggression, betta fish may soon be known for a milder trait: cooperation. When two Betta ...

Experienced aquarium owners know they should research different fish species before putting them in their tanks. Some fish are very aggressive and will fight with or eat their tank mates. Meanwhile, ...

When two betta fish are fighting for dominance, not only do their attacks mirror each other, but the gene expression in their brain cells also starts to align. The new findings may explain how the ...