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

This story appears in the July 2014 issue of National Geographic magazine. Off the coast of southwest Florida, a hundred feet below the water’s surface, a whump rolls through the sea. Another ...

These fish are also known as the fish with the big brain—literally. Flowerhorn cichlids are instantly recognizable thanks to their large forehead hump, but their personality is just as prominent.