Invertebrates

LATEST TODAY'S CATCH

Lettuce Sea Slug

May 20, 2013 - 8:57AMThe lettuce sea slug (Elysia crispata) has enlarged fleshy appendages that are folded over one another, with colors ranging from blue to green, with purple and red lining. The green coloring is what gives this mollusk it's common...
May 16, 2013 - 9:04AM
In this video Smithsonian research zoologist Dr. Martha Nizinski takes...
May 15, 2013 - 8:12AM
Discovering new species is an exciting quest, right? Well, some parts are—...

SPOTLIGHT

A World Adrift: Life in the Sargassum

The open ocean is surprisingly barren to the naked eye. Every now and again you will encounter a school of fish and their...
Jan 26 2010 - 11:46am
In 1874, Reverend Moses Harvey of Newfoundland bought a dead giant squid caught by fishermen. More about the giant squid can be found in our Giant Squid featured story.
Jan 26 2010 - 11:46am
Flower-like clusters of polyps make up this coral colony. Their pink color comes from the zooxanthellae living inside. More about coral reef ecosystems can be found in our Coral Reefs featured story.
Aug 3 2010 - 9:54am
This beautiful spider conch (Lambis chiragra) was collected by Census of Marine Life scientists conducting research near China.  
Aug 10 2012 - 4:05pm
This tan urchin, Conolampas sigsbei, is one of only two known deep-sea urchins that cover their tops with small rocks and shells. Many shallow species cover themselves for reasons that have been determined experimentally. However, none of these explanations make sense for urchins living in the deep...
Jan 9 2013 - 10:51am
These cancer cells have been treated with discodermolide, a chemical obtained from a sponge that grows on deep-sea coral reefs. It prevents the cells from dividing and spreading. Learn more about deep-sea corals in the multimedia feature "Coral Gardens of the Deep Sea" and about drugs from sea...
May 30 2012 - 12:38pm
The open ocean is surprisingly barren to the naked eye. Every now and again you will encounter a school of fish and their attendant predators, but most of the life that you find is gathered around some sort of sheltering structure like a coral reef.
Jul 29 2010 - 10:58pm
Using a deep-diving ROV, the crew aboard Oceana’s research vessel Ranger were surprised to discover large colonies of deep-sea white coral in the Western Mediterranean Sea in July 2010. Most of the Mediterranean’s deep-sea coral reefs are already gone as a result of destructive fishing techniques...
May 20 2012 - 1:03pm
A mantis shrimp (Odontodactylus scyllarus) holds her clutch of eggs in her clubbed claws. Usually these claws are weapons that punch hard-shelled prey at speeds of more than 50 miles an hour.
Aug 2 2012 - 5:36pm
Octopuses can change the texture and color of their skin to blend in with their surroundings. This day octopus (Octopus cyanea) has shaped itself like seagrass or some coral so hide from predators or stalk prey.
The Baltic Sea faces challenges from pollution, algae blooms, over fishing, and invasive species.
Oct 12 2011 - 4:56pm
In the spring of 2011, a research crew from Oceana spent two months in the brackish Baltic Sea. The Baltic faces challenges from pollution, algae blooms, over fishing, and invasive species. Oceana researchers gathered data, samples, photographs, and videos with the goal of proposing an...
Jan 26 2010 - 11:45am
This magnified photo provides a close-up look at copepods—tiny crustaceans that right whales feed on. There are many species of copepods that live throughout the water column, from floating at the surface to buried at the bottom of the sea. They are very small so right whales need to eat a lot of...
Jan 26 2010 - 11:45am
Like it or not, giant squids are related to snails, clams, and even slugs. They are all mollusks and have soft, fleshy bodies. More can be found in the Giant Squid section.
A Right Whales Shows Its Baleen
Dec 8 2009 - 11:51am
For being so big, right whales eat very small food, which they catch using baleen. Baleen is the series of fringed plates hanging in right whales' mouths that are used to strain seawater for food. Until the early 1900's, right whales were heavily hunted primarily for their fatty blubber, which...
Aug 16 2012 - 12:21pm
If there had been room to stand up, there would have been a standing ovation. As it was, the five of us on the submersible Curasub clapped and cheered when the first three deep-reef ARMS (Autonomous Reef Monitoring Structures) were successfully deployed at approximately 396 feet (120 meters). 
Jan 6 2011 - 2:45pm
A cnidarian brought up from the Arctic seafloor more than 2000 meters (6562 feet) deep.
Medicines from the Sea
Jan 14 2011 - 12:08pm
You may not think of the ocean as a pharmacy but scientists are developing exciting new medicines from the sponges, corals, and other marine organisms found in the sea. Explore other videos that capture the beauty and mystery of the ocean realm at NOAA Ocean Today.