Yes, they are raised. How do I get rid of them? These plants are in a qt tank at the moment and I haven't gotten the chance to rinse them in potassium permanganate or bleach solution yet. I also just found these little red worms tucked into little crevices - among the heater, floating plants, etc. They don't seem to swim anywhere and just simply wriggle in one spot? Could they be related to the black streaks?