Bettas have become one of the most popular fish for first-time fish owners to purchase. Much of this has to do with the beautiful colors the fish come in and the perceived simplicity of their care.

Scientists found that the fish were gradually domesticated like dog breeds into the beautiful shapes and colors that turn up today in pet stores. A betta fish, also known as the Siamese fighting fish, ...

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 ...