March 2004
Swimming Sentinels
Fish enlisted in protecting water supplies from toxins
By David Talbot
A high-tech ichthyological version of a canary-in-the-coal-mine warning system is nearing market. It's a system that monitors fish behavior as an early general warning of water purity problems. The system is being tested in several places, including New York City's reservoir system, ahead of commercialization later this year.
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Massachusetts Institute of Technology