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.
Flying machine (The War of the Worlds)
Flying Machines appear in The Asylum's film "", the sequel to "H.G. Wells' War of the Worlds". The "squid-walkers" are a living race of Tripods controlled by a single entity inside the mothership. They each carry a kind of Heat Ray and need human blood to survive, so they transport living humans to the mothership and drain their blood. Their weapons are powerful enough to destroy buildings as well as humans; one scene shows a fleet of squid-walkers completely destroying London and Paris.