The lakes also contained small snails, ostracods, and when conditions were suitable, freshwater clams.
en.wikipedia.org Gathering seafood by hand can be as easy as picking shellfish or kelp up off the beach, or doing some digging for clams or crabs.
en.wikipedia.org One major type is those which are roundish and occur through the natural rising of the dough such as "volcanes" (volcanos) and "almejas" (clams).
en.wikipedia.org Commercial fishing brings in shark, sailfish, sierra, sea bass, mojarra, lobster, shrimp, clams and many other species.
en.wikipedia.org White croakers eat a variety of fishes, squid, shrimp, octopus, worms, small crabs, clams and other items, either living or dead.
en.wikipedia.org