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 machines of this film have several searchlights mounted on the fronts of their main "heads," facing forward for navigation and night illumination. As in Wells' novel, the tripod's three legs are completely flexible, even rubber-like in their appearance and movement, with no visible mechanical joints or pivot-points; they propel themselves by truly "walking" over any terrain. This can be viewed as faithful to the original novel, where Wells describes the fighting machines as being more organic than mechanical in their appearance. Spielberg's tripods also emit loud, deep bellows, which seem to be a means of calling out to one other, similar to how Wells' originally described them doing in his novel. The sounds used by the tripods in the film consist of one loud 113 Hz blast (between A2 and A#2 on the musical scale) for three seconds, followed by a deep 136 Hz blast (near C#3) for another three seconds, sounding very much like Earth lighthouse foghorn blasts. Some have noted that the bellows created by the Tripods sound similar to a Gjallarhorn, specifically the one the Minnesota Vikings installed after moving to U.S. Bank Stadium. The fighting machines are also equipped with numerous retracting and expanding tentacles for capturing humans and for other tasks. They also have two possibly detachable metal-wire cages attached directly underneath along the rear and on each side of the machine's main body, used for temporary human prisoner storage; a metal hatch in the body over each cage dials open, revealing an organic hole that then opens to allow a smaller tentacle to reach into the cage, pulling a captured victim into the machine every few minutes for off-camera blood processing. At one point, it is revealed that a human with explosives, after getting put into one of the cages and later being pulled into the tripod, destroys its interior by detonating the explosives, demonstrating an effective, yet highly risky method of bringing down a tripod.