Aquatic earthworms? I've finally found a lab pet I don't like. These guys took over in one of my reactors and changed the whole dynamic of the system. It seems filamentous organisms are earthworm caviar as they munched away most of my prolific population of filaments in about 2 days. Or maybe its some form of ethnic cleansing. I need to find the worm leader and give him (invariably men are responsible for these things) an ultimatum. Call off your foot soldiers or I'll send you back to the treatment plant.....people flush all kinds of toxic substances down the drain. No more cushy lab life with synthetic substrate. Bizarre. My reactor has become a compost pile and its not even fun to look at under the microscope. Except I sometimes enjoy smashing them under the coverslip and watching their guts spill out.

Check out this video to see what it looks like under the microscope:
http://www.microscopeforums.com/f16/aelosoma-hemprichi-12.html

another picture of my worms