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NOAA’s New Millennium Observatory was set up to study geologic, chemical, and biologic interactions along the mid-ocean ridge system. Here, a remotely operated vehicle (ROPOS) recovers a volcano monitor in the Juan de Fuca Ridge in the Pacific, west of Oregon.
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Studying the Mid-Ocean Ridge

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Illustration of the extinct ammonite, related to the modern squid.
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Ammonite

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Squid size comparison chart: Lycoteuthis springeri (10-12cm), Leachia atlantica (up to 12cm), Promachoteuthis sp. (up to 5cm), Batoteuthis scolops (up to 20cm).
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What is the Largest Squid? A Squid Size Comparison Chart

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Sea anemones, brittle stars, and sea urchins make a home on mangrove roots.
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Mangrove Roots Up Close

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These corals are dead—smothered in sediments and overgrown with algae.
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Dead Coral Overgrown with Algae

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This Marine National Monument protects a chain of atolls and reefs 1,931-kilometers (1,200-miles) long.
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Northwestern Hawaiian Islands Marine National Monument

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The Florida Keys National Marine Sanctuary encompasses several state parks and wildlife refuges.
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Florida Keys National Marine Sanctuary

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These bleached corals in the Gulf of Mexico are the result of increased water temperatures.
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Bleached Corals

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A few corals are part of this small sampling of the approximately 35 million specimens represented in the invertebrate zoology collection housed at the National Museum of Natural History.
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Specimens from the Smithsonian Invertebrate Zoology Collection

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Shallow water coral reefs straddle the equator worldwide.
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Global Distribution of Shallow Coral Reef Ecosystems

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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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A translucent arctic comb jelly.
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Arctic Comb Jelly

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