Hi Vicky, If the worms head looked like an arrow its probably plinaria. It could also be a bristle worm if it swims in the water like a snake.Both are harmless.Could also be a type of fluke. ---------------------------------------------------------------------------- -- Norm Ruebsamen and Susan Stacey in Somers, WI E-mail: smstacey at execpc_com Fishlist: http://www.execpc.com/~smstacey/