MORE ANATOMY
Jan 26 2010 - 10:46am
A mass of white muscle the size of a softball surrounds the dark brown beak of a giant squid. Learn more about this animal's oversized anatomy in our Giant Squid section .
Aug 2 2012 - 4:18pm
This common octopus ( Octopus vulgaris ) doesn't have a jetpack to help him zoom through the water, but he's got something pretty close: a siphon that shoots water. (It's the little orange/yellow cup...
Sep 20 2012 - 11:45am
Sperm whales have conical teeth on their long, narrow, lower jaw. The teeth fit neatly into sockets in the upper jaw, which has no teeth. This arrangement is a perfect adaptation for slurping up soft...
Feb 7 2012 - 11:32am
The clearly pictured spines, rays and snout make identifying this longnose butterflyfish, Forcipiger longirostris , straightforward in this X-ray image. Scientists in the Division of Fishes at the...
Sep 12 2012 - 10:45am
This scanning electron micrograph magnifies the tiny teeth that cover the surface of the giant squid’s tongue-like organ, or radula . Seven rows of sharp teeth help direct tiny pieces of food down...
Jun 11 2013 - 9:39am
Giant squid have the largest eye in the animal kingdom. At up to 10 inches in diameter, people often describe it as the size of a dinner plate -- or, in other words, as big as a human head. Here,...
Jan 26 2010 - 10:45am
The distinctive form of a winghead shark, Eusphyra blochii , is revealed by an X-ray image. The shark's eyes are spread far apart, giving it superb binocular vision. Scientists in the Division of...
Jan 26 2010 - 10:45am
Like octopods and cuttlefishes, giant squid have eight arms. But they use their two much longer feeding tentacles to seize prey. The tentacles have powerful suckers at the ends. More about the giant...
Feb 6 2012 - 5:48pm
The elongated body, characteristic long and narrow snout, and small teeth make the slender snipe eel, Nemichthys scolopaceus , easily identifiable in this X-ray image. in the Division of Fishes at...
Jul 20 2012 - 12:57pm
Dr. Clyde Roper discusses the fascinating anatomy of the giant squid ( Architeuthis dux) in this excerpt of "Eyeball to Eyeball," an episode of Errol Morris' First Person television series. Watch...
Dec 17 2009 - 6:00pm
Scientists in the Division of Fishes at the Smithsonian's National Museum of Natural History use X-ray imaging to study the complex bone structure and diversity of fish. This image gallery showcases...
May 14 2013 - 9:19am
An X-ray image of a Monterey skate ( Raja montereyensis ) reveals a spine that extends like a tail out from the pelvic fin. The skeletons of skates, rays, chimaeras, and sharks are made of cartilage...
Dec 31 2012 - 7:49am
A right whale opens its mouth wide, revealing huge plates of baleen hanging from its upper jaw. There are between 200 and 270 baleen plates on each side of a right whale's upper jaw. They work like a...
Sep 12 2011 - 2:55pm
These are fossil remains of archaeocetes, ancient whales, from the Paracas Formation of Peru's Pisco Basin . Smithsonian paleobiologist Nicholas D. Pyenson and a team of scientists discovered the...
Jul 12 2012 - 11:12am
Many sperm whales stranded on beaches or caught by whalers exhibit telltale circular scars like these. Only one thing could have made them: the strong suckers that line the giant squid’s eight arms...
Jan 26 2010 - 10:45am
This X-ray shows the mouth on the underside of a white-rimmed stingray ( Himantura signifer ) . The ray feeds without seeing its prey. Its eyes are on the top of its body, while its mouth is on the...
Jan 26 2010 - 10:46am
Inside the giant squid's sharp beak is a tongue-like organ called the radula (shown in yellow). Covered with rows of tiny teeth, it rams bite size pieces of food down the squid's throat. The pieces...
Dec 5 2012 - 10:09am
An X-ray image of grooved razorfish, Centriscus scutatus . Razorfish are encased in thin, transparent bony plates attached to their spines, which you can see in the X-ray. Scientists in the Division...
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