Sea Creature

Bivalve of sorts, these are the long siphon variety. This guy is in a small pool of water, the tubual on the left is the spout, and every once in a while it blows sand out, I suppose along with other debris. The siphon on the right is the intake, it has oak leaf shaped tentacles.

Took some doing to figure this all out, we posted them onto the NHS Identification forum.