This is a giant shipworm. You may wish it had stayed in its tube
The New York Times - 04/18/2017
In a study published Monday in Proceedings of the National Academy of Science, Daniel Distel, a microbiologist at Northeastern University, and colleagues described a live one for first time. Its symbiotic relationship with bacteria provides clues to how the giant shipworm evolved its strange way of eating, and may enrich our understanding of infection in humans.
“We were used to shipworms, which are very delicate creatures and much smaller,” said Dr. Distel, who spent two decades searching for a living specimen of this elongated clam. “This thing is a really beefy animal.”