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Illustration of colorful nudibranchs from Ernst Haeckel.
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Nudibranchs

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"Break On Through" was taken by Wendy Wolf at California's Pfeiffer Beach. This photo was a winning selection in the Portraits of Planet Ocean Flickr contest.
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Break on Through - Wendy Wolf

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A tornado of sardines swirls around diver and photographer Erwin Poliakoff in the Philippines.
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Inside a Sardine Tornado

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Neptune grass (Posidonia oceanica) is a slow-growing and long-lived seagrass native to the Mediterranean.
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Fish Feeding in Seagrass

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Participants in the challenge must first set a compass bearing in the direction they are headed to properly navigate underwater.
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Setting a Compass Bearing

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During whale hunts, this carved whale box stored harpoon blades like the three shown beside it.
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Inupiat Harpoon Box

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Tlingit paddlers set the canoe in Washington’s Potomac River for its ceremonial launch.
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Canoe Placed in Potomac River

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Vertebrates evolved in the sea and eventually moved onto land. The ancestors of whales later returned to the sea.
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Whales Returned to the Sea

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North Atlantic right whales migrate seasonally along the eastern coast of the United States.
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North Atlantic Right Whale Territory

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Sometimes the raven monitored Chilton’s progress from an overhead perch.
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Raven Keeps Watch over Carver

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A whale size comparison chart
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What is the Largest Whale? A Cetacea Size Comparison Chart.

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This raven routinely observed master carver Douglas Chilton as he shaped the canoe.
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Raven Watches the Carver

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