Today's Catch

A shortfin mako glides through the waters off the coast of California.

Shortfin Mako Shark

The shortfin mako shark ( Isurus oxyrinchus) is found offshore in tropical and warm temperate waters of all oceans, but has been known to travel to cooler waters at times. It is very strong and the fastest known species of shark, reaching moving...
Freshly cut dorsal fin from a scalloped hammerhead shark held by fisherman with knife.

Sharks Threatened by Finning

This photo of a freshly cut dorsal fin from a scalloped hammerhead shark ( Sphyrna lewini ) , was taken in 2006 on a long-lined fishing boat in Cocos Island, 300 miles off the Pacific coast of Costa Rica. Cocos was declared a UNESCO World Heritage...
The dwarf lantern shark sits in a human hand.

Dwarf Lantern Shark

The smallest shark, a dwarf lantern shark ( Etmopterus perryi ) is smaller than a human hand. It's rarely seen and little is known about it, having only been observed a few times off the northern tip of South America at depths between 283–439 meters...
The squidworm has 10 tentacle-like appendages on its head.

The Squidworm - A New Species

In the Coral Triangle, a biodiverse area between Indonesia and the Philippines, scientists discovered this swimming polychaete (bristly worm), which they have dubbed the "squidworm." Using a remotely operated vehicle, the researchers with the Census...
This jewel squid (Histioteuthis bonnellii) lives above the Mid-Atlantic Ridge.

Jewel Squid

This beautiful jewel squid ( Histioteuthis bonnellii ) can be found swimming above the Mid-Atlantic Ridge, at depths of 500-2,000 meters (1,640-6,562 feet). The “jewels” covering the body are bioluminescent photophores. But these squids can't...
Salps are tube-shaped, soft, transparent animals that swim through the ocean, straining out plant food as they go.

Antarctic Salps

Climate and sea changes in the Southern Ocean create conditions that favor the growth of salps over krill , the latter of which are a vital food source for seals, whales, and penguins. Salps are filter-feeding tunicates that float through the water...

Toothy Goby in Coral

The toothy goby or common ghost goby ( Pleurosicya mossambica ) lives among soft corals and sponges in the Indo-Pacific ocean. The relationship it has with its host is commensal , which means the goby benefits from the protection and habitat in the...

Spiders from Mars

"Two arrow crabs in a cup coral, lit from behind. It seemed to be a scene from a 1960s monster movie," wrote Carl Salonen of his image , a winning selection in the Portraits of Planet Ocean Flickr contest . Arrow crabs ( Stenorhynchus seticornis )...

Squid Watching Over Eggs

All squid species have long been thought to lay their egg clusters on the sea floor and move on. Then in 2005, scientists from the Monterey Bay Aquarium Research Institute (MBARI) observed a deep-sea squid species ( Gonatus onyx ) that keeps close...
Parrotfish in Mucus Cocoon

Parrotfish in Mucus Cocoon

A parrotfish ( Chlorurus sordidus ) creates a mucus cocoon to protect it from parasites, like bloodsucking isopods , while it sleeps. Read more from the Citizens at Sea blog .

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