04-14-2004, 05:52 AM
I was thinking down those same lines. Worms breath through their skin. Worms have a water based slimy coating. Water is a good coating for oxygen exchange. An oily coating is not. They may feel like they're [size 1]suffocating[/size] and rush to the surface to try to get oxygen. On the other hand, the contaminants may simply be irritating, so they come to the surface in an attempt to get away from the source of the irritation.
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