Pool fingers are very rare stalactite-shaped formations that form subaqueously, in cave pools. Most of the ones known are from Lechuguilla Cave, New Mexico. I shot the photo below while diving in a large lake there, and was about 10 feet below the surface when I encountered them. While the exact origin of these forms is unknown, they are suspected to be calcified organic material, such as bacterial stringers.

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	Created: December, 1998 Author: Dave Bunnell