Oceans At Risk Oceans cover 70 percent of the globe, but because they are three-dimensional they represent 90 percent of the habitat on Earth. And they're in trouble. This series looks at the threats facing the world's oceans, and the activities to preserve this vital resource.
A colorful reef fish swims near a Caribbean reef.
Special Series

Oceans At Risk

A coral reef near the Caribbean island of Bonaire teems with plant and animal life. Rising water temperatures and increasing ocean acidity pose enormous threats to this wondrous but vulnerable ecosystem. Mark Vermeij hide caption

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Mark Vermeij

Glassy sweepers are small nervous fish that can cluster in groups of over a hundred. When they're young, their bodies are nearly transparent, allowing an observer to see what these fish just ate. Mark Vermeij hide caption

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Mark Vermeij

A longfin damselfish patrols its algae garden off the coast of Bonaire. Damselfish kill a section of the coral, and then wait for algae to grow in the dead spot. On this coral, only a few live sections remain. Henry DeBey hide caption

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Henry DeBey

Tiny Damselfish May Destroy A Caribbean Reef

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Passengers on a whale-watching ship in Massachusetts Bay. Whale watching is one of many recreational activities that draw people to the waters off the coast of Massachusetts. Kerry Crisley/The Nature Conservancy hide caption

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Kerry Crisley/The Nature Conservancy