This was actually interesting.. BUt I agree.. likely a bio-lum critter.. and i'm gonna bet with one thats generally from the deep that roams inland at night. alot of freaky things down deep. and to doubly agree.. the more I learn about whats in the water.. the more I won't go into it.. pools and hot-tubs are about as far as I go with swimming anymore. and I'll go ankle-deep in the ocean... on a good day.