Divers helped rescue a sea turtle in the Florida Keys and then, because of pollution, they had to euthanize her.

This Canadian diver prefers to seek out the bugs, beasts and macro critters that often go unnoticed underwater.

Shark advocate Dr. Erich Ritter passed away at age 61 in his Pensacola, Florida, home on Friday. Dedicated to understanding shark-human interactions, Ritter spent most of his life advocating for shark conservation.

The best places to go diving with great white sharks, hammerhead sharks, whale sharks, and more. Plus: How to do it safely.

No, whale sharks' eyeballs are not covered in miniature teeth. Here's what the discovery of dermal denticles in a whale sharks eyes actually means.

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In Barbados, the local community works together to keep lionfish off the coral reefs and on the menu.

When and where to go snorkeling with five species of whales and dolphins.

The IUCN Red List is a collection of the best available scientific data analyzed and summarized by an international team of experts—such an assessment is not an opinion and not a guess. But such an assessment does not carry the force of law, and IUCN Red List Endangered status doesn’t mean the same thing as being considered endangered under the U.S. Endangered Species Act.