Octopus to fool prey by directing them towards the mouth, making them one of the few bioluminescent octopuses. Octopuses mainly move about by relatively slow crawling, with some swimming in a head-first position. Jet propulsion, or backwards swimming, is their fastest means of locomotion, followed by swimming and crawling. When in no hurry, they usually crawl on either solid or soft surfaces. Several arms are extended forwards, some of the suckers adhere to the substrate and the animal hauls itself forwards with its powerful arm muscles, while other arms may push rather than pull. As progress is made, other arms move
Astern propulsion the wheel brakes and shortening the landing rollout. Helicopters can develop thrust in any direction, including astern. Most mechanically driven land vehicles can develop astern propulsion, although in this case the ability is more usually termed 'reverse'. In land vehicles reverse propulsion is usually achieved through various transmission arrangements. Astern propulsion Astern propulsion (as applied to a ship) is a maneuver in which a ship's propelling mechanism is used to develop thrust in a retrograde direction. Astern propulsion does not necessarily imply the ship is moving astern ("in reverse"); astern propulsion is used to slow a ship by applying a