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The first known filter feeder is a large shrimp-like creature called Tamisiocaris borealis. The feather-like structures on its head were used to rake plankton from the sea.

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The First Filter Feeder

Today, filter feeders like clams, sponges, krill, baleen whales, fishes, and many...

An Illustration of small tentacled fossils.

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Ancient Entoproct Community

For a long time, scientists thought that some small tentacled fossils were early...

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Cockatoo Squid

This transparent cockatoo squid (Leachia sp.), also known as a glass squid, lives...

A fringe of tentacles surrounds the bell of this jellyfish (Halicreas minimum).

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Midwater Jellyfish

A fringe of short tentacles surrounds the flattened bell of this tiny, transparent...

Illustration of a four-legged proto-whale with webbed feet.

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Early Whale with Webbed Feet

This early whale was well suited to life at sea. But it also may have spent time on...

An illustration of multispecies communities of dugongs from India, Mexico and Florida

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Multispecies Communities of Seacows

Sirenians, or seacows, are a group of marine mammals that include manatees and...

This copepod (Gaussia princeps) was collected deeper than 1000 meters in the Sargasso Sea by Census of Marine Zooplankton (CMarZ) researchers in April 2006.

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Deep Sea Copepod

This copepod (Gaussia princeps) was collected deeper than 1000 meters in the...

Smithsonian Ocean

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The First Filter Feeder

Ancient Entoproct Community

Cockatoo Squid

Midwater Jellyfish

Early Whale with Webbed Feet

Multispecies Communities of Seacows

Deep Sea Copepod

Smithsonian Ocean

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The First Filter Feeder

Ancient Entoproct Community

Cockatoo Squid

Midwater Jellyfish

Early Whale with Webbed Feet

Multispecies Communities of Seacows

Deep Sea Copepod

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