The Warty Venus Clam is a clam of the Veneridae family. It resides of the coasts of Europe and West Africa down to a depth of 508 feet. It is also known for it's popularity in France as a fancy seafood dish, where regulations have been put in place to help conserve the clam.
iT's Cardiovascular system (and that of most clams)
Clams have an open circulatory system. Their blood is pumped directly to their major organs through large vessels. They then go atop the cells of the clam's organs. From there, it collects into spaces called lacunae, where it passes through the clam's kidney and gills to collect oxygen. It then returns to their hearts, completing the cycle.