Showing results for
A Swimming Snail
Sea butterflies (also called pteropods) are sea snails aptly named: they are...
These "elevator" rudists, an ancient bivalve, used one long heavy valve to anchor...
Where ocean currents were strong, ancient rudist “recliners” lay unattached on...
Rudist clams are mollusks that went extinct about 65 million years ago. They were...