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Coral sand is aptly named: it's sand made up of tiny bits of coral and other ocean animals such as foraminifera , molluscs, and crustaceans. This image, taken at 100x zoom, took 18th place...
Male fiddler crabs each have a single super-sized claw that they use as a...
The jingle shell ( Anomia simplex ) is a common bivalve found on the Atlantic...
The sun sets over the Smithsonian’s Marine Field Station at Carrie Bow Cay,...

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Necora puber , also known as the velvet swimming crab, may not be as soft as the name implies. The crab's red eyes and aggressive nature have resulted in a second nickname, devil's crab . As if it weren’t intimidating enough...
Large waves are a draw for surfers, scientists and spectators alike to...
Bonaire, a small Caribbean island just north of Venezuela, is routinely...

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Welcome to Moorea, a tiny, isolated island in the middle of the vast Pacific. Moorea is 132 square kilometers (51 square...
The sun sets over the Smithsonian’s Marine Field Station at Carrie Bow Cay, Belize.
The jingle shell ( Anomia simplex ) is a common bivalve found on the Atlantic coast of North America, amongst the more commonly known clams and oysters. As with oysters, the lower shell is glued to a...
Bonaire, a small Caribbean island just north of Venezuela, is routinely ranked as a top diving destination in the world. But there's something getting in the way of beautiful dives: plastic trash...
Adaptation is the key word if you are looking to survive in a tide pool, a space that some scientists describe as the most competitive real estate in the ocean. Tide pools are exposed to the water's...
Male fiddler crabs each have a single super-sized claw that they use as a weapon to threaten and fight other males and as beautiful adornment to attract females. Here, see a video of two male dancing...
Anemone porcelain crabs may look delicate but they have their own sort of armor: a hard exoskeleton. They live under rocks, sponges, groups of feather stars, and even in giant anemones where they can...
Over the last few days, a video of hermit crabs stampeding across the rocky shores of St. John in the U.S. Virgin Islands has taken the internet by storm. Where are the hermit crabs going, and why?...
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