All photographs copyright (2003-2013) by Kris H. Light

These squiggly marks on the wood were made by a snail or a slug. Their mouth has rows of tiny teeth on the "tongue", called a <em>radula</em>. This photograph shows where a snail or slug has eaten algal cells growing on a wooden bridge.
These squiggly marks on the wood were made by a snail or a slug. Their mouth has rows of tiny teeth on the "tongue", called a radula. This photograph shows where a snail or slug has eaten algal cells growing on a wooden bridge.

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