Invertebrates

FEATURES

Video
In a decade long project, which ended in October 2010, scientists with the Census of Marine Life traveled the world cataloging the ocean’s life forms. From Australia to China to the Gulf of Mexico...
Slideshow MORE STORIES Slideshow MORE AUDIO / VIDEO
From the giant squid to microscopic squid babies, squids are beautiful and...
Since summer 2013, starfish along both coasts of the United States have been...
Slideshow MORE STORIES Slideshow MORE AUDIO / VIDEO
Tiny plant-like organisms called zooxanthellae live in the tissues of many...

LATEST POSTS

A huge colony of brittlestars (likely Ophiacantha rosea ) covers the peak of a seamount in the deep ocean. What’s the attraction? Food! Their arms reach out for tiny food particles carried by the swift Antarctic Circumpolar...
This copepod Calanus hyperboreus (up to 7mm in length) lives in the Arctic...
Deep-sea corals miles away from the source of the Deepwater Horizon oil...

LEARN MORE

Coral reefs are the most diverse of all marine ecosystems. They teem with life, with perhaps one quarter of all ocean...
Marine parasites may be small in size, but they can be present in very high numbers and put together can weigh even more than all the top predators in an estuary or bay ecosystem! They play an...
Octopi (Or octopuses, both are technically correct) are renowned as one of the smartest animals alive. With no bones except for their sharp beak, they can fit through almost any hole or crevice...
Brachiopods are an ancient group of organisms, at least 600 millions years old. They might just look like clams, but they are not even closely related. Instead of being horizontally symmetrical along...
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...
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 .
Depending on whom you talk to, jellyfish are either fascinating, a nuisance, a toxic menace, or some combination of the above. Jellyfish plop into the media spotlight when their presence causes beach...
The ocean is home to many moms of all shapes and sizes: from charismatic polar bears and dolphins to small fishes and shrimps and more. Learn about some of the diverse parenting habits of marine moms...
http://www.flickr.com/photos/islandconservation/6951137074/in/photostream/
A veined octopus ( Amphioctopus marginatus ) briefly leaves its hiding spot, a seafloor shell, to devour a crab.
This octopod is sometimes called a “Dumbo” octopod because its fins resemble the ears of Disney’s Dumbo the elephant. The video was recorded in 2003 on the Mid-Atlantic Ridge by the Russian manned...
These two nautiluses ( Nautilus belauensis ) are pictured off the coast of Palau in the Pacific Ocean. There are six living species of nautilus who live in chambered shells. As they get bigger, they...
This photo shows just a small part of the cephalopod collection at the Smithsonian's National Museum of Natural History. Shown here is Dr. Clyde Roper , a zoologist and squid expert. More about the...
“Upon returning from the reef after a night dive, I swam toward a bright reflection and came eye-to-eye with this beautiful, curious squid," said Charles Viggers, a Nature's Best photographer. Squids...
The over 1,000 species of ribbon worms ( Nemertea ) are mostly found in marine environments (like the Hubrechtia found in a mud flat, in the photo). These worms have both a mouth and an anus (unlike...
How do you get two dead Giant Squid the size of a school bus from a fishing boat in Spain to Smithsonian’s National Museum of Natural History in Washington, D.C.? Call in the U.S. Navy! In this...
The Endangered Species Act (ESA) was signed into law on December 28, 1973 by President Nixon. Over 2,000 species are currently on the ESA, and they are separated into "Threatened" and "Endangered"...
A mangrove tree crab ( Aratus pisonii ) clings to a leaf near the Smithsonian Institution’s marine laboratory on Galeta Island, Panama, part of the Smithsonian Tropical Research Institute . During...
Smithsonian Zoologist Dr. Clyde Roper , the world's foremost authority on giant squid, explores the squid collection at the National Museum of Natural History. He is passionate about giant squid and...
Subscribe to Invertebrates