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A sea butterfly, or sea snail, swims in the open ocean.
Photo

A Swimming Snail

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Two baby olive ridley sea turtles.
Photo

Baby Sea Turtles in Jalisco, Mexico

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Nine small invertebrates held on two fingers.
Photo

A Handful of Biodiversity

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A spiraled diatom with spines.
Slideshow

The Ocean Under the Microscope: Images from Nikon Small World

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White abalone
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White Abalone In Danger

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The blue lined octopus can be deadly, so it is best to stay away.
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The Dangerous Blue Octopus

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A rendering of an underwater marine scene depicting life ~145-65 million years ago, when rudist clams were the major reef builders.
Photo

Carbonate Reef (Cretaceous Period: 145 - 65 Million Years Ago)

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a black and white photo of a ship from the 1930s
Article

Remembering the First Smithsonian Expedition to Puerto Rico

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an illustration of pufferfish species and their relatives
Article

Pufferfishes and Their Relatives

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Rough periwinkles sit on a bed of barnacles.
Slideshow

A Seashore Walk

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A submersible explores the deep reefs off of Curacao in the Caribbean.
Overview

DROP: The Deep Reef Observation Project

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Where the pH is the lowest, corals can no longer grow - sand, rubble and seagrasses replace the reef.
Article

Sneak Peek: Future of Coral Reefs in an Acidifying Ocean

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