Betta fish—also known as Siamese fighting fish ... and are a dull gray, green, olive, or brown. Before mating, the male spends hours blowing bubbles at the water’s surface to build what ...

Betta fish are incredibly popular ... Electric Blue Acaras have light blue scales with yellow, green, and orange markings. They’re beautiful, almost pastel-colored Cichlids.

A new study published in Animal Welfare examined how tank size and furnishings impact the behaviour of Siamese fighting fish (Betta splendens), one of the world's most popular aquarium fish.