The Mollusk Pictured Below Is Best Described as

The mollusk pictured below is best described as

A) an invasive species that has caused billions of dollars in damage.
B) a prized delicacy that is illegally hunted for commercial purposes.
C) a model of a successful captive breeding program.
D) a species that unregulated harvesting has driven to the brink of extinction.
E) an ocean filter that regulates pollution of large bodies of water.