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On coral reefs fish are important links in the food chain that sustains higher-order predators (including humans) and keeps everything in balance.
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Black Axil Chromis on a Coral Reef

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Dr. Erica Miller, of the Louisiana State Wildlife Response Team, cleanses an oil-covered pelican in Plaquemines Parish, LA.
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Cleaning an Oiled Pelican in Louisiana

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A frame-by-frame view of a Great White Shark breach- frame 7.
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Breaching Sequence 7

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A school of yellowfin surgeonfish feed near dusk off Canton Island in the Phoenix Islands.
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Yellowfin Surgeonfish

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A photograph of a bright blue-speckeled dinoflagellate bioluminescing at night.
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Bioluminescing Dinoflagellate

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After ocean scientists sort deep-sea coral samples into their different types, they measure and photograph the specimens.
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Photographing Coral Samples

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The Johnson-Sea-Link submersible returns with a specimen of Keratoisis bamboo coral inside its collection box.
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Submersible with Coral Samples

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The pink strands of this coral harbor a variety of organisms. Sea whips are gorgonian corals, with flexible skeletons.
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Sea Whip Coral

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: A thicket of Lophelia pertusa, a widespread deep sea coral, shelters a squat lobster.
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Coral Thicket with Lobster

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Scientists use a multinet to collect zooplankton.
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Launching a Multinet

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An Isopod Full of Fish Blood
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Isopod Engorged With Blood

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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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