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Scoop.it!
Researchers may have solved a piece of the puzzle surrounding how fish “smell” harm.
When one fish is injured, others nearby may dart, freeze, huddle, swim to the bottom or leap from the water. The other fish know that their school mate has been harmed. But how? 
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Scoop.it!
When one fish gets injured, the rest of the school takes off in fear, tipped off by a mysterious substance known as "Schreckstoff" (meaning "scary stuff" in German). Now, researchers have figured out what that scary stuff is really made of.
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