Clam Beds: These clams have symbiotic bacteria in their gills that feed them the same way the tubeworms symbionts feed the worms. The clams like to live in warm water coming up through little cracks in the basalt. Although we don't see nearly as many different animals living among the clams as we do among the tubeworms, funny little crabs, called squat lobsters, are usually in the area, as are small vent fish. An occasional visitor, but not a friend to the clams, are octopuses.