Portuguese man o' war
The Atlantic Portuguese man o' war lives at the surface of the ocean. The gas-filled bladder, or pneumatophore, remains at the surface, while the remainder is submerged. As the Portuguese man o' war has no means of propulsion, they move according to the winds, currents, and tides. Although they are most commonly found in the open ocean in tropical and subtropical regions, they have been found as far north as the Bay of Fundy, Cape Breton and the Hebrides.
Fighting machine (The War of the Worlds)
The Fighting Machine (also known as "Tripod") is one of the fictional machines used by the Martians in H.G. Wells' 1898 classic science fiction novel "The War of the Worlds". It is a fast-moving, three-legged walker, reported to be 100 feet tall, with multiple whip-like tentacles used for grasping, and two lethal weapons: the heat-ray and a gun-like tube used for discharging canisters of a poisonous chemical black smoke that kills humans and animals. It is the primary machine the Martians use when they invade Earth, along with the handling machine, the flying machine, and the embankment machine.
The fighting machines walk on three tall, articulated legs and have a grouping of long, whip-like metallic tentacles hanging beneath the central body, a single flexible appendage holding the heat-ray projector, and atop the main body a brazen hood-like head that houses a single Martian operator. H. G. Wells first describes the fighting machines in detail in Chapter 10: