Fish used to detect terror attacks
A type of fish so common that practically every American kid who ever dropped a fishing line and a bobber into a pond has probably caught one is being enlisted in the fight against terrorism.
Bluegills — a hardy species about the size of a human hand — are considered more versatile. They are highly attuned to chemical disturbances in their environment, and when exposed to toxins, they experience the fish version of coughing, flexing their gills to expel unwanted particles.
http://news.yahoo.com/s/ap/20060919/...sc/terror_fish