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

A large fish native to North America has caught the attention of scientists in recent years due to its impressive lifespan of ...

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

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 ...

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 ...

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