Planaria are a non parasitic flatworm of the class Turbellaria. The fresh water animal that we come across in our Aquariums is a subclass species Dugesia.They are primary carnivorous, but are also known to be scavengers eating detritus and other decaying organic matter. Planaria are not hunters and prefer dead or dying pray as well as fish eggs. Planaria are usually found in aquariums that have an abundance of uneaten fish food. These animals just don't appear in your tank and must be intro