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A photo of Oceana's ice class research vessel, the Hanse Explorer, on the Baltic Sea.
Slideshow

Biodiversity in the Baltic Sea

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Small orange brittlestars on the coast of the Atlantic.
Photo

An Invasive Brittlestar

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Seahorses are the only fish species that can hold your hand! Unlike most fish that use their tails for swimming, seahorses, such as this big-belly seahorse (Hippocampus abdominalis), use their monkey-like tails to hold onto objects in their environment, li
Photo

Seahorses Have Monkey-Like Tails

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A polar bear and its cub in Arctic National Wildlife Refuge, Alaska.
Slideshow

Celebrating Marine Moms

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Illustration of colorful nudibranchs from Ernst Haeckel.
Article

Art Forms in Nature: Marine Species From Ernst Haeckel

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The siphonophores are an order of marine animals in the phylum Cnidaria (the same phylum containing jellyfish). 
Slideshow

Prints from Ernst Haeckel

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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
Slideshow

Stunning Squid Pictures

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Colorful scaleworm on a seastar
Article

Pops of Polychaete Color

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a neon purple jellyfish
Article

Live Jellyfish Make Splash in Marine Education

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a man with a hard helmet in a cave
Article

Adaptation in the Extremes: What Scale Worms Teach Us About Evolution

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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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Jellyfish produce mucus, especially when stressed, which can interact with oil and break it down. This moon jellyfish is sloughing off mucus that has mixed with droplets of oil.
Article

How Jellyfish Break Down Oil After a Spill

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