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Jan 26 2010 - 11:45am
A male mudflat fiddler crab (Uca rapax) waves its huge claw to impress females and threaten male competitors. More about the animals and plants living in mangrove ecosystems can be found in the Mangroves section.
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Apr 18 2013 - 10:35am
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 tentacles.
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Dec 7 2011 - 4:12pm
Scientists know the Greenland shark (Somniosus microcephalus) moves slowly in the Arctic's cold water. They also know that parasites attack the shark's eyes. But much about this animal remains a mystery. Marine biologist Greg Skomal says that's because the Greenland shark spends most of the year...
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Jun 4 2012 - 10:55am
The yellow bioluminescent ring on this female octopus (Bolitaena pygmaea) may attract mates. Bioluminescence is an important adaptation that helps many deep sea animals survive in their dark world.
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Jan 22 2013 - 10:53am
This tiny, shrimplike creature is no more than 2.5 centimeters (1 inch) long, but it’s as ferocious as a shark. Its giant eyes spot prey. Huge claws grab the prey, and a tiny mouth rips it to shreds. The prey never sees what’s coming, because Phronima’s transparent body blends into the surrounding...
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Jul 19 2012 - 9:14am
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 Current.
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Aug 17 2011 - 3:25pm
Chapter 3: Fragile Fauna
Jelly Critters
Grade Level: 5-6
Focus: Life Science- Gelatinous zooplankton in the Canada Basin
Description: In this activity, students will be able to compare and contrast at least three different groups of organisms that are includ
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May 29 2012 - 11:42am
Great White Sharks are stealthy hunters and the secret is in their skin. Shark skin is covered by tiny flat V-shaped scales, called dermal denticals, that are more like teeth than fish scales. These denticles decrease drag and turbulence, allowing the shark to swim faster and more quietly. Olympian...
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Mar 8 2013 - 10:57am
These beautiful mandarinfish (Synchiropus splendidus) are covered in bright blue, red, yellow and orange waves. What they lack, however, are traditional fish scales. They live in western Pacific tropical coral reef ecosystems and instead of your typical fish scales they are covered in a smelly,...
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Jan 17 2013 - 12:23pm
Snow on land can make some people grumpy, but the magical-looking flakes and a beautiful layer on the trees can turn even disenchanted adults into gleeful children again. But what is the ocean equivalent of a snowy night?
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Oct 27 2010 - 1:56pm
Claws, spines, spikes, tentacles, and fangs. Aliens, monsters, and ghostly apparitions glowing in the night. Marine life forms have some of the best looks for Halloween—no costumes needed. From freaky fish lurking beneath the surface to creepy crawlies of the deep, meet some of the sea’s strangest...
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Oct 5 2012 - 10:01am
Glowing photophores are visible on a squid (Abralia veranyi) viewed from below at low light levels. We think of light as a way to see in the dark. But many species use it to help them hide. This adaptation is called counterillumination. Seen from below, an animal might stand out as a dark shape...
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Dec 4 2009 - 3:27pm
About 100 million years ago, during the heyday of the dinosaurs, reefs were built by mollusks called rudist clams. Like modern clams, rudists were bivalves, with two shells (or valves) joined at a hinge. But they sure didn’t look like modern clams!
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Mar 12 2013 - 7:35am
Stinging cells (nematocysts) line the tentacles of this moon jelly (Aurelia aurita). Upon contact with prey or a predator, a venom-laden harpoon shoots out to stun or kill. Read more about jellyfish anatomy in our jellyfish and comb jellies overview page.
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Dec 7 2009 - 11:04pm
This crab (Neolithodes sp.) was collected on a NOAA/MAR-ECO cruise to the Mid-Atlantic Ridge in the summer of 2009. Its red color provides camouflage and protection from predators. Red wavelengths are strongly absorbed by water, so red light does not normally reach the midwater ocean zone. Most...
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Jun 12 2012 - 10:11am
This lizardfish (Bathysaurus ferox) rests on the ocean bottom with its head slightly elevated—waiting to snatch prey with its large mouth and sharp teeth. It lives at depths of 600-3,500 meters (1,969-11,483 feet) and grows up to 64 centimeters (25.2 inches) long.
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Dec 7 2009 - 11:10pm
This aptly named fish (Anoplogaster cornuta) has long, menacing fangs, but the adult fish is small, reaching only about 6 inches (17 cm) in length. It's teeth are the largest in the ocean in proportion to body size, and are so long that the fangtooth has an adaptation so that it can close its mouth...
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Jan 26 2010 - 11:45am
This jelly’s red color provides camouflage in the deep ocean. Red light rarely reaches those depths, and most deep-sea animals have lost the ability to see red. The long, complex tentacles of this unidentified comb jelly (Order Cydippia) have sticky cells that can snag prey, and then retract.
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Dec 12 2012 - 10:33am
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 bargain for their lives with those jewels: they have been...
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Jan 6 2011 - 3:36pm
Several species of amphipod like this one, Gammarus wilkitzkii, live permanently within Arctic sea ice. These animals are endemic, meaning they only live here. They acclimate to a wide range of salt levels in the water using a physiological response called osmoregulation.
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Apr 10 2013 - 9:03am
Check out the eyes on these Hawaiian squirrelfish (Sargocentron xantherythrum)! Because squirrelfish are almost entirely nocturnal, they need big eyes to absorb as much moonlight and starlight as they can in the dark. During the day, they hide out in the nooks and crannies of tropical coral reefs....
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Nov 20 2009 - 3:35pm
Giant squid live up to their name: the largest giant squid ever recorded by scientists was almost 43 feet (13 meters) long, and may have weighed nearly a ton. You’d think such a huge animal would be hard to miss. But because the ocean is vast and giant squid live deep underwater, they remain...
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Sep 21 2011 - 1:23pm
At the Poles, Life Thrives
Located beside the Shores and Shallows gallery (which highlights different kinds of coastal ecosystems around the world), the Poles area will take you to the ends of the earth and empower you with a broad understanding of life and physical conditions at both poles.
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May 23 2011 - 3:50pm
Adaptation is the key word if you are looking to survive in a tide pool, a space that some scientists describe as the most competitive real estate in the ocean.
Tide pools are exposed to the water's ebb and flow, and plants and animals must adapt to survive wave turbulence, desiccation stress,...
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