Scientists are racing to save sea stars from extinction through breeding. Here's what they're learning about the different species—from arm-wrestling bat stars to bloodless blood stars.

This story appears in the October 2018 issue of National Geographic ... branches of the animal family tree, but they also live in different habitats; some like the ocean surface, others the ...

Once found in tropical oceans around the world, the largetooth sawfish’s range has shrunk by an estimated 60 percent in a ...

The "mega" colony is made up of nearly one billion polyps, according to National Geographic. Corals are animals related to jellyfish and sea anemones. The mega colony is a part of the Pavona ...

Yet fish populations around the world, and the animals that eat them ... helped fund this article. The National Geographic Society and Sky Ocean Ventures have launched the Ocean Plastic Innovation ...