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)
In the Asylum's 2008 sequel "", the walkers are tripods called "squid-walkers", and are capable of flight. Unlike the first film, the Martians do not control the fighting machines directly from the inside but manipulate cyborgs by remote control. A heat-ray is attached to the walkers, as well as a kind of ray that teleports humans directly to the alien mothership, where humans are then drained of their blood to feed the invaders. Whereas Wells' fighting machines carried cages to hold captured humans, these tripods place humans directly into the tripods' interiors. These appear organic, with no windows or controls, and the walls absorb anyone unlucky enough to touch them, sending them to an unknown destination.