Some aquarium buddies are much more interactive than you'd expect—they follow their owners around, beg for food, and even ...

If your aquarium feels a little blah, maybe it’s missing some bold personalities. We’re talking fins that flash like neon signs and colors that could outshine a fashion runway.

However, with the right setup and attention, it can be a stunning addition to a marine aquarium. Discus fish are renowned for their striking, disk-shaped bodies and a wide range of vibrant colors ...