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Lying in water only a foot deep, I watched the shark meander lazily through the mangrove, already exuding the confidence inherent of the supreme creature within its domain. It was hot here...
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Animals, on land and in the ocean, live in a 3-D world, and they depend on...
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The TOPP program brought together scientists from seven countries to explore...
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Reef sharks rarely get any love. These sharks, comprising several species,...
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Jun 12, 2013 - 9:02AM
The sea's largest fish has been a mystery until recent decades. Thanks to electronic tags, researchers are uncovering some of the secrets of the whale shark ( Rhincodon typus Smith, 1828 ). One tagged animal, dubbed "Rio Lady,"...
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CREDIT: © Mary Parrish/Smithsonian Institution 1. Respect Your Elders Sharks have a long and impressive lineage. Ancient...
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Nov 2 2010 - 12:43pm
Animals, on land and in the ocean, live in a 3-D world, and they depend on their sense organs and brains to build the mental constructs that allow them to orient and navigate, which is crucial for...
Jan 26 2010 - 10:45am
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...
Oct 28 2010 - 7:01pm
The International Union for the Conservation of Nature ( IUCN ) maintains the Red List of Threatened Species , an inventory of the global conservation status of plants and animals. In a 2010 study ,...
Jan 10 2013 - 9:47am
Sharks have young in three different ways. After internal fertilization, some species lay a thick egg case that encloses the shark embryo (seen in the photo here). Most species are ovoviviparous,...
Sep 1 2011 - 3:08pm
CREDIT: © Mary Parrish/Smithsonian Institution 1. Respect Your Elders Sharks have a long and impressive lineage. Ancient sharks were cruising the ocean 400 million years ago--long before dinosaurs...
Aug 16 2012 - 11:22am
Enric Sala has spent much of his career looking for the ocean's "time machines" -- areas rich in biodiversity and largely unaffected by humans. In this recorded webcast , Sala, a National Geographic...
May 16 2012 - 4:35pm
How do we know where ocean animals swim day and night? Scientists are getting snapshots into the daily lives of whales , sharks , and even fish by tagging the animals to track their movements. You’ve...
Jan 26 2010 - 10:45am
Great White Sharks breach to hunt -- with split-second timing they grab an unsuspecting seal or sea lion in one swift snatch. Follow the action in this slideshow . More about the great white shark...
Jan 26 2010 - 10:45am
A scientific illustration of the most powerful fish of its time, Carcharodon megalodon , which swam the ocean 30 million years ago. This shark may have reached a size of 20 meters/66 feet. Meet other...
Feb 6 2013 - 8:47am
At night this lemon shark ( Negaprion brevirostris ) lurks at the surface, but often during the day they will lie on the ocean bottom. This behavior had been thought to save them energy, but in...
Jan 26 2010 - 10:45am
Great White Sharks breach to hunt -- with split-second timing they grab an unsuspecting seal or sea lion in one swift snatch. Follow the action in this slideshow of a breaching sequence .
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