When planning a small aquarium, selecting appropriate fish species is the key to success. Small tanks can easily become overcrowded, quickly leading to poor water quality and unhappy, stressed ...

Choosing the best tropical fish for your freshwater ... is the smallest species on our list and a great fish for small aquariums. Males grow to just one inch long, while females max out at less ...

Deep below the surface of a river in northern Brazil, a “shy” creature tucked its “armored” body into a rocky crevice. Divers spotted the patterned animal and recognized it as a popular aquarium pet.