It tentic
Though an octopus may move over the ocean floor using its tenticles, if startled it will force water through its syphon and jet away, often leaving a cloud of black ink (highly concentrated melanin) to confuse an enermy.
a siphon
The siphon of an octopus is a versatile anatomical structure that serves multiple functions. Primarily, it is used for locomotion; the octopus can expel water through the siphon to propel itself quickly in the water. Additionally, the siphon aids in respiration by drawing water over the gills for oxygen extraction. It can also be involved in the release of ink as a defensive mechanism.
by propulsion. the propel themselves through the water if you ride the Kraken you'd know.
Octopus do not have fins. They swim by using their arms and body. If they need to go very fast, they squirt water out of their siphon and use "jet propulsion." Mostly, an octopus will just crawl around on the bottom to get around. Some Octopus do have ear like appendage's with which the use to propel themselves through the water also. They are also refereed to as Dumbo Octopus.
a dolphin gets around by using its tail and flippers to propel itself through the water.
A jellyfish moves through the water by contracting and relaxing its bell-shaped body, pushing water behind it to propel itself forward.
The opposite direction of the water it moved.
Well Octopuses don't squirt out water from themselves, they propel they're tentacles from an open position downward which acts like a rocket and propels the octopus forward.
It sucks in water and then pushes it out to propel itself.
It uses its 8 tentacles and thrashes them to propel through the water, like if you swam moving your arms to the sides
With the tail. useing his tail moving it back and forth he also sways his body a little
A jellyfish swims by contracting and relaxing its bell-shaped body, pushing water out to propel itself forward. This movement is called pulsing, and allows the jellyfish to move through the water.