Mertock

Mertock is one of the supporting antagonists in Treasure Planet and one of the alien pirates in John Silver's crew. He seems to be an anthropmorphic manatee with clawed fingers, coiled tentacles that serve as his two legs, and a pudgy horn-like limb that sprouts from his head. He had a part in the raid on the Benbow Inn, (yelling out "Where is it?!" scavenging through drawers containing silverware for the map that Billy Bones tried to hide from the pirates. It is unknown what had happened to Mertock in the film, as he is last seen restraining when he, Silver, and the other pirates ambushed Jim.