The term 'Heavily-Armed Sea Creatures' refers to octopi, which are eight-armed cephalopods found in the ocean. Octopi have two rows of suckers on each arm, and can use them to grab and manipulate objects. They also have a beak-like mouth and venomous saliva, which they use to capture and paralyze prey. Octopi are highly intelligent creatures, and have been known to use tools to solve problems.