 That's Mark Faherty. He's the science coordinator at Mass Audubon's Wellfleet Sanctuary. And a little further down the beach, he points to a pile of horseshoe crabs in the water. It's an orgy, though he's got a nicer name for it. This is a mating cluster of horseshoe crabs. So at the nucleus of this, it's what do we have? One, two, three, four, five, six males around one female who's borrowed in.