Trapdoor Crab || Skull Island

The Trapdoor Crabs resemble giant crabs with large red claws. Their faces feature small orange eyes and two long, thin antennae. Their bodies are rounded and gray in color, with three pointed, segmented legs protruding from each side. They have fanged mouths which are concealed behind their mandibles.

After Charlie and Mike were marooned on the shores of Skull Island, a Trapdoor Crab rose from the sand and attempted to grab the former. Charlie dodged out of the way as another crab grabbed Mike by the leg and started dragging him closer to it. Charlie dodged the claws of several crabs and tried freeing Mike. The Trapdoor Crab grabbing Mike revealed its fanged mouth before the latter kicked its claw and broke free of its grasp. Several Trapdoor Crabs rose their claws and snapped them at the two in their attempts to catch them. Mike and Charlie then ran to a lone rock as the crabs burrowed beneath the sand.

Stuck on the rock, Mike grabbed a nearby seashell and threw it out in the open, alerting multiple crabs as they attempted to grab it. As Mike and Charlie conversed, a small crustacean walked along the sand before a Trapdoor Crab grabbed it and dragged it down. Charlie grabbed a Baby Rock Bug initially mistaking it for a rock and threw it out toward the crabs. Several Trapdoor Crabs rose their claws and snapped them at the Rock Bug as the creature dodged all of their attacks. The crabs then turned their attention to Mike and Charlie but quickly retreated beneath the sands.

Later, a Trapdoor Crab attempted to grab Charlie but was stopped by Annie, who threw a spear at it. Annie then threw a large stick near the crabs. Many of the crustaceans' claws emerged from the sand but were attacked by Annie using a harpoon. Several crabs attempted to attack Charlie and Mike as they attempted to flee. A crab knocked Charlie down with its claw and tried grabbing him, but was restrained by Mike. Charlie then fled and tossed the harpoon at Mike, who proceeded to repeatedly stab the Trapdoor Crab's claw. Angered, the crab fully emerged from the sand, only to retreat after hearing Kong's roar.

Claws
The Trapdoor Crabs are capable of using their claws to grab prey. Once caught, they use their claws to drag prey underground.

Burrowing
Trapdoor Crabs are able to burrow beneath the sands of Skull Island using their claws and legs.

Prey detection
The Trapdoor Crabs are capable of detecting prey within a close radius. However, this is limited to potential prey physically standing on the sand around them, as they were unable to detect Charlie and Mike when they stood on a rock.

Weaknesses
The crabs appear to be weak to attacks from sharp objects, as shown when Annie incapacitated a crab using a spear and used a harpoon to injure several of the crustaceans.