Today's Catch

Spiral-tufted bryozoan

A Bryozoan's Medical Endosymbiont

The spiral-tufted bryozoan ( Bugula neritina ) is being studied for a potential Alzheimer's disease and cancer drug—but it's not the bryozoan that makes the chemical. The chemical, found in the bryozoan's tissues, is produced by its bacterial...

Curious Bohar

The twin-spot snapper ( Lutjanus bohar ) is one of the more curious predators in the central Pacific, says marine ecologist Stuart Sandin of the Scripps Institution of Oceanography. "It poses commonly for the camera but is also immediately on-hand...
Tiny "flakes" of marine snow.

A Snowy Underwater Wonderland

As we dive deeper into winter in the northern hemisphere, the possibility of snow becomes an increasingly frequent topic of conversation. But did you know that the ocean gets a regular dose of ‘marine snow’ year round? The flakes in the ocean are...

Pink Coralline Algae

Many species of pink coralline algae cover a reef surface in the Southern Line Islands. Often unnoticed, these pink algae crusts help to cement coral reefs together, providing extra support and habitat for animals that live on reefs. Unhealthy coral...

Emperor Penguins on the Ice

Standing at twice the height of the Adélie penguins, emperor penguins are the largest of the penguin species and can grow to be 100 pounds. This species breeds directly on the ice: a female lays her one egg and then passes it to the male to protect...
Color illustration of an ancient bivalve.

Elevator Rudists

These "elevator" rudists, an ancient bivalve, used one long heavy valve to anchor themselves in the sediment. They used their tentacles (shown here in pink) to filter food from the sea water. And many often grew together to form early reefs. Learn...

Hitchhiking Seahorses

Seahorses are hitchhikers. They can travel long distances across the ocean—farther than they can swim—by attaching themselves to floating seaweed and debris. Read 10 more facts you never knew about seahorses .
Seven of the newly discovered Starksia blennies, small fish with elongated bodies

Seven New Fish Discovered

Starksia blennies, small fish with elongated bodies, generally native to shallow to moderately deep rock and coral reefs in the western Atlantic and eastern Pacific oceans, have been well-studied for more than 100 years. It would have been...
The head of a turtle-headed sea snake.

A Turtle or a Sea Snake?

Like other sea snakes , the turtle-headed sea snake ( Emydocephalus annulatus ) has fangs and venom. But its venom is weak so, instead of defending with a bite, the species tends to react to danger by swimming back to a crack or crevice to hide. For...
Photograph of a translucent red-orange comb jelly against a black sea.

Red Mid-Water Comb Jelly

Like this ctenophore ( Aulococtena acuminata ), many animals that live in the midwater zone are red—making them almost invisible in the dim blue light that filters down from the sea surface. This small comb jelly snares prey with its two short...

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