Mokele-mbembe

While the Venture crew pursued King Kong across Skull Island to rescue Ann Darrow, they came upon a large swamp. The men created a raft and attempted to cross the swamp, but the head of a sauropod suddenly emerged from the water and destroyed the raft, grabbing several of the men in its mouth and tossing them away like ragdolls. Those who escaped swam to the shore and proceeded to run away into the woods, but the ferocious Mokele-mbembe climbed out of the water and followed them, charging through the forest and mounting a second attack. Jack Driscoll, Carl Denham and several other members of the crew scaled trees to escape, but those who were unable to follow them were quickly killed by the dinosaur. After roaring at the survivors, the Mokele-mbembe returned to the water and disappeared.