Killer flatworm: new species hunts with puffer fish toxin.

Science News | February 18, 2006| | Copyright

A newly discovered saltwater flatworm, pale yellow and about the size of a silver dollar, can take down mollusks in their shells, thanks to a powerful neurotoxin also found in puffer fish.

Yet this formidable hunting tool flops as a defense against fish eating the flatworm, says Raphael Ritson-Williams of the Smithsonian Marine Station in Fort Pierce, Fla.

The puffer fish poison, tetrodotoxin, has turned up in a variety of other creatures that spend at least part of their lives in water. These include other flatworms, frogs, North America's rough-skinned ...

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