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Model of a lion’s mane jellyfish on display at the Smithsonian National Museum of Natural History. This jellyfish, a member of the phylum Cnidaria, can have tentacles up to 190 feet long (58 meters) and a bell almost 7 feet (2 meters) in diameter.
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Lion's Mane Jellyfish in Sant Ocean Hall

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A comic from illustrator Karen Romano Young.
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Antarctic Log 2.3

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Pearly nacre of a nautilus shell
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Osmena Pearl

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Graph of magnitude 5 or greater earthquakes from 1900- April 2011.
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Graph of magnitude 5 or greater earthquakes from 1900- April 2011

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Sea lion with data collector on back.
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Sea lion with data collector on back

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Photograph of many tiny transparent larval squid surrounding the head of a dissecting pin.
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Squid Babies

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These Smithsonian field stations enable scientists worldwide to conduct long-term studies on mangrove ecosystems.
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Description of Smithsonian Field Stations

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Octocorals dominated the seafloor on Chris Mah's Okeanos mission to Johnston Atoll in the remote Pacific Ocean.
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Deep-sea octocorals: An ecosystem of their own

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A cuttlefish eye
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Dazzling Eyes

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Auster and colleagues direct a remotely operated vehicle (ROV) dive on the New England Seamounts.
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Scientists Conduct an ROV Dive

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Adult green sea turtles spend most of their time grazing in seagrass meadows.
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Green Turtle in Seagrass

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The acidic waters from the CO2 seeps can dissolve shells and also make it harder for shells to grow in the first place.
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Dissolving Shell

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