After 9/11, the testing to detect contaminants in water supplies abruptly moved from an arcane laboratory exercise to a front-burner item in the forefront of the rapidly developing homeland security market. One of the biggest newsmakers in the emerging marketplace may be a tiny organism called daphnia. The tiny water fleas–typically about 3 mm long–are commonly used as bioindicators. Now, Aqua Survey Inc. is unveiling a detection kit that uses daphnia to quickly determine whether ricin, cyanide, VX, botulinium toxin and other toxins are present in a municipal water supply. The Flemington, N.J.-based firm presented slides and film of daphnia...