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This orange boring sponge (Cliona varians) overgrows several coral species at Panama's Smithsonian Tropical Studies Institute.
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Boring Sponge on Coral

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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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Two nurse sharks hover over a baited cage
Lesson Plan

Jelly Critters: Gelatinous zooplankton

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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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Image of deep-sea crustacean with black background.
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Vibilia

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 Scientist Martha Nizinski holds a specimen of a fan sponge (Phakellia sp.) collected at a deep-sea coral study site off the coast of South Carolina.    
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Fan Sponge

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Colorful crustaceans from the Caribbean island of Guadeloupe.
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Colorful Caribbean Crustaceans

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Nine small invertebrates held on two fingers.
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A Handful of Biodiversity

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Bright bubblegum coral sits on a brown, hard substrate.
Article

Optimism in the Deep Sea - Connecting Corals, Museums, and Ocean Managers

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A small, transparent, shell-less sea snail in the open ocean.
Article

Angels of the Sea

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Horizontal bands of color represent different species of lichen that have adapted to the conditions at different heights above sea level.
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Seaside Lichens

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A blue-ringed octopus
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How Octopuses and Squids Change Color

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