I shot this crab in LaoLao Bay, Saipan at night in about 30 feet. At first I thought it was a Spooner Crab, but in every Spooner Crab photo they have sharp barbs on the side of their upper shell perimeter. As you see this guy has smooth edges on his shell. Please help me figure out what the name of this crab is. By the way, this crab is about 6-7 inches wide across his back. Thanks