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New deep sea expeditions reveal new species underwater.
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New Jelly Species: 'Bathykorus bouilloni'

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A veined octopus sits inside a vacant bivalve shell, which it uses as a portable shelter, in the Philippines. This is one of the few examples—if not the only example—of tool use in invertebrates.
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Veined Octopus at Anilao Batangas Pier, Philippines

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“Upon returning from the reef after a night dive, I swam toward a bright reflection and came eye-to-eye with this beautiful, curious squid.” -- Nature's Best photographer Charles Viggers.Equipment Used to Capture the Shot: Nikon D700; 105mm ƒ/2.8 lens
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Squid at Sunset Reef Grand Cayman, Cayman Islands

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A small giant clam -- yes, that's it's real name -- in Australia's Great Barrier Reef.
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Great Barrier Reef, Australia

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Photo collage of six species of invertebrates.
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Invertebrates from the Gulf of Mexico

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Hermit crabs, like this one collected in Moorea, usually protect their soft, vulnerable abdomens from predators by reusing empty snail shells. This specimen shows the crab without its customary borrowed shelter.
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Hermit Crab Without a Shell

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Riftia tubeworm (Riftia pachyptila) colonies near hot spring.
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Tubeworms on a Hydrothermal Vent

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Two nurse sharks hover over a baited cage
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Just Jelly: ecological role of gelatinous zooplankton

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Two nurse sharks hover over a baited cage
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Benthic Drug Store

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This male dancing fiddler crab (Uca terpsichores) has built a sand “hood” at the entrance to his burrow, which he hopes will attract females to his humble abode—as if that big beautiful claw of his weren't enough!
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The Design of a Beautiful Weapon

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The elusive giant squid
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Reflections on the Successful Search for the Giant Squid

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Pearl oysters create pearls when a hard particle is coated with calcium carbonate (nacre) after entering the oyster.
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Pearls of Wisdom

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