Discovery Channel :: News, Photo Zoom :: Tiger Sharks Keep Seagrass Tidy
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November 23, 2009 navbardiscovery.comDiscovery ChannelTLCAnimal PlanetTravel ChannelDiscovery Health ChannelDiscovery Store
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Photo Zoom

In the Balance
Aaron Wirsing

In the Balance
The manatee-like dugong, pictured here, would eat seagrass away completely in its marine ecosystem if not for the presence of its predator, the tiger shark, say researchers.


Pictures: Aaron Wirsing

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