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A male mudflat fiddler crab (Uca rapax) waves its huge claw to impress females and threaten competitors.
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The Mudflat Fiddler Crab

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Male fiddler crabs, like this one collected on Moorea, wave their enlarged claw as way of signaling to other crabs, especially during mating season.
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Fiddler Crab

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Rough periwinkles sit on a bed of barnacles.
Article

Spirals in Time: A Walk at the Seashore

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an upside down scuba diver
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Building Good Mussels

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A glowing ocean surface.
Article

Six Ways to See Ocean Ocean Bioluminescence

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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!
Article

The Design of a Beautiful Weapon

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Photograph of a many-armed sea star with maroon and white feathery-looking arms, with a deep red sea fan in the background.
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Feather Star

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A pink, white and black colored boxing crab holds two anemones in its claws.
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Boxing Crab

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Even when a lobster is still a developing egg, you can see some of its adult features: an eye and legs.
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Lobster Egg

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Lacy Crust Bryozoans
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Lacy Crust Bryozoan

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Sea star in a tide pool
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Tide Pools and Adaptations

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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!
Photo

The Dancing Fiddler Crab Shows Off

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