“I found this guy schlepping along a beach in Mexico”, writes this reader about the creature pictured below. “What the heck is it?” Well, we are wondering the same thing. If it weren’t for our reader stating that there was an organism in the photo, we definitely would have missed it. It just looked like a slightly raised portion of sand. For that reason, there is no identifying information in the photo, since we cannot see the actual worm. That said, it does bring to mind some possible identifications.