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Sharks range in size from the largest fish on the planet to the length of your palm. See how you compare to some of these vulnerable predators that are so crucial to the oceans health.\r
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Whale shark\r
This slow-moving, filter-feeding shark is the largest known fish species alive.\r
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Great hammerhead shark\r
A wide head helps these sharks scan for and pin down rays and other prey.\r
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Great white shark\r
This legendary predator lives in coastal surface waters worldwide. Its serrated teeth may be a link to extinct ancestors.\r
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Greenland shark\r
Scientists suspect that this slow-growing Arctic species can live up to a hundred years.\r
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Tiger shark\r
This shark is named for its distinct black stripes, which fade in adulthood.\r
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Bluntnose sixgill shark\r
Sharks typically have five gills, but this primitive species has six. Most related species are extinct.\r
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Oceanic whitetip shark\r
Due to high demand for shark fin soup, these large-finned sharks are in decline.\r
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Angel shark\r
With flat bodies and broad pectoral fins, angel sharks resemble rays and skates.\r
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Japanese sawshark\r
Its long, toothy snout helps it sift sand for prey but can get snared in gill nets.\r
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Portuguese dogfish\r
These bottom-feeders live in darkness, at depths greater than all other sharks.\r
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Horn shark\r
This solitary shark uses its horned head to crack open mollusks and crustaceans.\r
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Dwarf lanternshark\r
Bioluminescent organs make these tiny sharks glow in the dark, attracting prey.\r
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Megalodon\r
A seven-inch fossil tooth of this extinct shark was used to project the scale of its massive body, which would have included jaws more than six feet wide.
