Have you ever noticed a mass similar to the one pictured below in Burnsville Lake? These are commonly mistaken for fish eggs, but they are actually a colony of microscopic aquatic organisms, Bryozoans. They feed on tiny organisms living in lakes, ponds, and streams. This helps to improve the clarity of the lake, and their presence indicates good water quality. They are a natural filtration system, and a food source for fish, insects, and snails.