Sarah Ann Thompson, a marine biologist from the Farallon Institute in Petaluma, California, is guiding me over the rugged rocks and through the tide pools of Bodega Head's Mussel Point ...

It eats the mussels, clams and other types of shellfish ... pools are constantly changing and evolving. As the tide goes out, the rock pools dry out. As the tide comes in, they fill with sea ...

It eats the mussels, clams and other types of shellfish ... pools are constantly changing and evolving. As the tide goes out, the rock pools dry out. As the tide comes in, they fill with sea ...