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Caribbean reef sharks swim over a coral reef in the Bahamas.
Article

Swimming With Sharks

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Vertebrates evolved in the sea and eventually moved onto land. The ancestors of whales later returned to the sea.
Photo

Whales Returned to the Sea

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Great White Shark at sea surface – marvels of evolution.
Photo

Great White Shark at Surface

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Two nurse sharks hover over a baited cage
Lesson Plan

Glass Squid

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Two nurse sharks hover over a baited cage
Lesson Plan

Deep Sea Squid

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The Komodo National Park site in Indonesia was inscribed on the World Heritage List in 1991. The site hosts "Komodo dragons" (Varanus komodoensis), a unique species that exists nowhere else in the world and is of great interest to scientists studying evolu
Article

Tunicates—Not So Spineless Invertebrates

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Two octopuses sitting underwater highlight the different textures the animals can take on.
Overview

Octopuses and Squids

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An illustration of the megalodon shark.
Overview

The Megalodon

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Two nurse sharks hover over a baited cage
Lesson Plan

Marine Environments

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