There is a long-standing tension between aquarium hobbyists and marine biologists over how to interpret fish behavior.

Betta fish, also known as Siamese fighting fish, are often regarded as one of the most accessible and colorful additions to the home aquarium. With their flowing fins, vivid colors, and striking ...

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 ...