Nourishment and destruction

It was low tide on a sunny day, and we ventured far out on the rocks, searching the life left by the waves. Hidden in the cracks, just visible here, we found thousands of tiny white mussels, fed by the surging waves that were channeled into the crevices between the granite boulders.

How did these tiny shelled creatures sense that here, and only here, they would be nourished by the very waves that threatened to destroy them?

For every ailment under the sun,
There is a remedy, or there is none;
If there be one, try to find it;
If there be none, never mind it.
~Mother Goose~