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A blue shark, with a copepod attached to its dorsal fin, coasts through waters near New England.
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Blue Shark

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Two nurse sharks hover over a baited cage
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I, Robot, Can Do That

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Two nurse sharks hover over a baited cage
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What is a Coral Reef? Middle School

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These wormlike animals make spiral tracks on the sea floor.
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Deep-Sea Worms

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Millions of sharks are caught each year for their dorsal fins, which are prized for shark fin soup. Top predators like sharks are important to maintaining biodiversity, and their removal can have ripple effects through an ecosystem.
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Finned Sharks in South Africa

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Compare the healthy coral on the left with the bleached coral on the right.
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Bleached Corals, Pacific Ocean

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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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Two bright orange anemonefish poke their heads between anemone tentacles.
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Clownfish in their Host Anemone

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a woman with short black hair and a long necklace of pearls sits in front of a microscope and holds a small button coral
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Joan Murrell Owens and her Button Corals

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Sea walls must be maintained consistently and will need to be built higher and higher as sea level rises. This type of man-made barrier also has implications for the natural coastline.
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French Sea Wall

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Blue Dragon nudibranchs are very common to the southeast coast of Australia and have a few color variations. Juveniles are white with blue rhinophores, and adults vary from dark purple to lavender to golden brown.
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Serpent Pteraeolidia

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