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
Pump-jet by diesel engines or gas turbines. Speeds of up to 40 knots can be achieved with this configuration, even with a displacement hull. Pump-jet powered ships are very maneuverable. Examples of ships using pumpjets are the fast patrol boat Dvora Mk-III craft, s, the s, s, the Stena High-speed Sea Service ferries, the United States Seawolf-class and Virginia-class submarines, and the United States littoral combat ships. Pump-jet A pump-jet, hydrojet, or water jet is a marine system that creates a jet of water for propulsion. The mechanical arrangement may be a ducted propeller (axial-flow pump), a centrifugal pump, or a