An octopus is a member of the cephalopod group, which is a type of marine animal that has a special organ from which they shoot water at high rates. this jet of water propels their body forward. how does this animals method of transportation demonstrate the 3rd law of motion?

The third law of motion says: for every action, there is and equal and opposite reaction. In the case of the octopus, this is nicely demonstrated with it's method of travelling. The octopus makes an action, which is it shooting water at high rates in a certain direction, and the equal and opposite reaction is that the octopus's shooting of water in certain direction, moves him into the opposite direction with the rate that it is shooting the water.