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a larval fish with specialized filaments that fan out like tentacles
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Larval Scalloped Ribbonfish

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Sea anemone illustrations from Ernst Haeckel.
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Sea Anemones

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This jelly’s red color provides camouflage in the ocean depths.
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Unidentified Comb Jelly

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A nudibranch showing a closeup of their fleshy, tentacle-like growths, called cerata.
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Aeolid Nudibranch Defense

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Leatherback turtles (Dermochelys coriacea) are the largest sea turtles, growing as long as six and a half feet (2 m) and weighing some 2,000 pounds (900 kg). They’re unlike the other marine turtles in two important ways: they have a thick leathery carapa
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Leatherback Turtle

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Dinoflagellates are major producers of oxygen in the ocean (and freshwater). But some species can grow out of control, causing a red tide.
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Dinoflagellate

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These zooplankton collected on a research cruise include a jellyfish, a lanternfish, a snipe eel, two large orange shrimp, a fuzzy pyrosome (which is bioluminescent), and several smaller animals.
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Counting the Ocean's Diversity

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Aegina, a type of jellyfish, swims through the water.
Slideshow

The Surprising Elegance of Midwater Sea Life

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A photo of a sea walnut, a ctenophore.
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Sea Walnut (Mnemiopsis leidyi)

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Green turtles (Chelonia mydas) live in the warm coastal waters of tropical and subtropical oceans. Adults sometimes eat sponges, salps (floating jelly-like animals), and jellyfish, but they feed mostly on plants, like seagrass and algae. The pigment f
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Green Turtle

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a mola mola fish swims around in the deep sea
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Mola mola - The Ocean’s Gentle Giant

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Henry the Fish is made completely out of colorful plastic that washed up on Oregon beaches.
Slideshow

Washed Ashore: From Beach Trash to Ocean Art

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