Mosquito larvae. Mosquitos are tolerant of pollution and can indicate polluted water Photo by James Gathany: https://en.wikipedia.org/wiki/Mosquitofish#/media/File:Culex_sp_larvae.png
Mosquito larvae, photo by James Gathany
Mosquito larvae. Mosquitos are tolerant of pollution and can indicate polluted water Photo by James Gathany: https://en.wikipedia.org/wiki/Mosquitofish#/media/File:Culex_sp_larvae.png
New York State Parks and Historic Sites Blog 
