Bakso, an adorable 5-month-old Sumatran tiger cub, can now be seen by Animal Kingdom park guests. He was the first tiger cub ...

From its unique vision to its hovering hunting style, this fish has evolved some of the most extraordinary traits in the animal kingdom. The barreleye is a small deep-sea fish, measuring about 6 ...

This underwater alliance between octopus and fish tends to pay off for both. Learn why the relationship works.

this wily little fish occupies its own unique niche. Danionella cerebrum, pictured above, produces some of the loudest sounds relative to its size in the ... [+] animal kingdom. These sounds play ...

A circulatory system that beats gravity. Spots that dissipate heat. This giant is purpose-built for its size and surroundings. This story appears in the October 2019 issue of National Geographic ...

In pipefish, a remarkable species of fish, it's the males who get "pregnant." A recent study reveals how these fish defy ...

Cephalopods may have the oldest sex chromosomes of any animal, according to a new discovery in the octopus genome.