I never realized they were in the river either until I helped one summer with a TU with stream sampling of a local river. We used a seine and kicked up the bottom at the tail out of a large deep pool. The sample never failed to turn up numerous aquatic worms, not just one or two either. There would often be 10-20 worms in a sample. They looked like these
"Have no fear of perfection - you'll never reach it."
Last edited by flyman; 11-30-2013 at 02:44 PM..