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A lemon shark pup swims through its shallow mangrove nursery off the coast of Bimini Island in the Bahamas.
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Young Lemon Shark Swims Through Mangroves

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

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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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An oceanic whitetip shark swims near a biologist in the Bahamas.
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Oceanic Whitetip Shark

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A close-up photo of Killer Algae, Caulerpa taxifolia, a seaweed that has proven to be a successful invasive species.
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Killer Algae (Caulerpa taxifolia)

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grains of sand collected from Orient Point, Long Island, NY
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Sand from Orient Point, Long Island, New York

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A rendering of an ocean scene as it may have looked 65 million years ago, when an astroid fell to Earth and triggered a mass extinction event.
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Cretaceous-Paleogene Boundary (65 Million Years Ago)

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Illustration of the Paleozoic shallow water habitat.
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A Mississippian Marine Habitat (359 - 318 Million Years Ago)

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A rendering of an underwater marine scene from the Cambrian Period, featuring an arthropod, annelids, and other animals.
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Cambrian Period (542 – 488 Million Years Ago)

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A rendering of an underwater marine scene from the Proterozoic Eon, featuring a creature that resembles a jellyfish and other organisms.
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Ediacaran Community, Proterozoic Eon (2,500 - 542 Million Years Ago)

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An artistic rendering of an ocean landscape as it may have looked during the Archean Eon.
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The Archean Eon (4,600 – 2,500 Million Years Ago)

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Curator and Research Scientist Lynne Parenti with student Shao-i Wang on a moped with fish collection gear
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Lynne Parenti NMNH Fishes Curator

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