Complex sentence: They can be "clam strips" (sliced parts of hard-shell clames) or "clams with bellies" (whole soft-shell clams); clams with bellies have the clam's gastrointestinal tract left intact and impart a fuller flavor.
Split into simpler sentences: They can be "clam strips" (sliced parts of hard-shell clams) or "clams with bellies" (whole soft-shell clams). Clams with bellies have the clam's gastrointestinal tract left intact and impart a fuller flavor.