Blue Crabs, an edible crab, are very common on Cape Cod, on the edges of salt marshes, or on the ocean shore. One type of shellfish that reside in the Cape Cod waters are the Quahogs , Cape Cod s signature mollusk. You can try to find them just below the sand and mud surface between low and high tides. Many people like to harvest Quahogs during the summer, but to do so, you must have a town fishing license from the town you are a resident of or visiting. Many people eat quahogs raw.
Mature quahogs are best for making clam chowder .
Sand Dollars are invertebrates that have a flat, circular outer shell. The shell has many perforations that form a symmetrical petal-like design. Commonly found on sandy bottoms in shallow water, they obtain food by engulfing sand from which they extract small plants and animals. Many kinds of jellyfish reside in the Cape s water s also. Not really fish they are relatives of sea anemones and corals.