we are not talking about true "worms" as in bristle worms or tube worms or peanut worms etc....
what are called "flatworms" are more like a kind of paper thin "slug"
not techicaly true but I think that gets the idea.
they are very thin, some are scavengers, some are predators.
but the scavengers create problkems as like hair-alge they will cover sand and rock and out-compete other stuff.
when they are high in numbers they can nuke a tank if they die.
like some cucumbers they have a toxic body fluid that when they die is released into the water.
