Today's Catch

Tomopteris's bristles produce yellow bioluminescence, a unusual color among midwater animals, nearly all of which make some sort of light.

Glow Worms

Tomopteris are segmented worms that are cousins to earthworms, but belong to a separate group called polychaetes , meaning many (poly) bristles (chaetes). Despite being related to earthworms, they look completely different due to the challenges that...
Monk seal pup

A Mediterranean Monk Seal Pup

Watch a recorded webcast about the latest efforts in Greece to study and save the critically endangered Mediterranean monk seal. Centuries of human exploitation and habitat destruction have caused the remaining populations of Mediterranean monk...
This female hyperiid (Phronima sedentaria), a type of marine crustacean, is surrounded by her young inside the hollowed out barrel-shaped body cavity of a salp.

Extreme Parenting

This female hyperiid ( Phronima sedentaria ), a type of marine crustacean, is surrounded by her young inside the hollowed out barrel-shaped body cavity of a salp. The mother Phronima presumably captures and kills the salp to build her nursery and...
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...

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...
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...

Bite Size: Bull Shark Predation of Tarpon

Follow a journey with satellite tags placed on bull sharks and tarpon. Both of these large predatory fish are found in coastal in-shore ecosystems and the two species have similar diets. If given the opportunity, bull sharks will catch and consume...

Magellanic Penguin Parent and Chick

A parent Magellanic penguin ( Spheniscus magellanicus ) sits with its big chick. Magellanic penguins live in South America, breeding in colonies along the coasts of Chile, Argentina and the Falkland Islands, and some migrate north to Brazil. Parents...

Plastic Bag Bans Work

There is a huge amount of plastic trash floating in the ocean, which endangers wildlife that eats or gets tangled in it. Reducing the amount of plastic trash in the ocean doesn't seem that hard; people just need to use less plastic, such as...

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