I was a student of Dr. Loren Hill way back when (circa 1973). I counted him as a friend up until he passed. I know a little about the research regarding the Color-C- Lector and the graduate assistant that worked on its development. From what I gathered from the GA, the field research, that backed the laboratory studies, was a little sketchy. The device itself was not much more than a probe that measures water clarity. Then in turn that clarity was partnered with the physics of light wavelength penetration in water. The GA told of being outfitted with SCUBA gear and dragged behind a boat trying to ID fish that he saw while water clarity measurements were taken simultaneously. Sound fishy (no pun intended)?