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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.
Photo

The First Filter Feeder

Today, filter feeders like clams, sponges, krill, baleen whales, fishes, and many...
Hagfish Slime Thread
Photo

Spin Hagfish Slime into Silk

Believe it or not, this unraveling thread is from hagfish slime. Hagfish are...
Mangrove Salt Glands
Photo

How Mangroves Deal with Saltwater

Looking at a white mangrove (Avicennia marina) leaf cross-section under the...
Dover Sole Skin
Photo

Close-Up of Dover Sole Skin

This close-up of the skin of dover sole (Solea solea) masks its true ability: to...
Red Algae
Photo

Branching Red Algae

Under the microscope, you can peer inside the cells of this filamentous red algae....
A spiraled diatom with spines.
Photo

A Diatom Helix

This beautiful marine diatom Chaetoceros debilis was caught in the North Sea. Not...
Unlike the green, leafy algae we're used to seeing, coralline algae has a hard crust—which you can see here at the molecular level under a scanning electron microscope.
Photo

Coralline Algae Under the Microscope

Unlike the green, leafy algae we're used to seeing on the seafloor, coralline algae...
A look into a whale shark mouth.
Photo

A Smiling Gentle Giant

The whale shark (Rhincodon typus) is the largest fish on Earth. They spend most of...
A blenny fish against both a white and black backdrop, where you can see its beautiful color pattern.
Photo

A New Fish DROP-ping In

By diving in the Curasub, Smithsonian researchers with the Deep Reef Observation...
An unidentified moray eel held in researcher's hands.
Photo

A Baby Moray Eel, or a Really Small Adult?

This is an unidentified moray eel, collected from 650 feet off the coast of...
Photo of three sea creatures involved in a scientific mystery
Photo

Three Mystery Fish

Are these three fish related? All three—a whalefish, bignose, and...
A species of sea cucumber from the Arctic discovered by Census of Marine Life researchers.
Photo

Arctic Sea Cucumber

This species of deep-water sea cucumber (Elpidia belyaevi) was discovered by Census...

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