Some marine animals (for example, cuttlefish) move in the water, throwing out a jet of liquid from themselves.

Some marine animals (for example, cuttlefish) move in the water, throwing out a jet of liquid from themselves. What physical phenomenon underlies this movement?

Marine animals use the principle of a jet engine. The jellyfish moves by abruptly squeezing out water, which it collects by contracting its transparent dome.

The cuttlefish collects water into the gill cavity, then vigorously releases it through the funnel.

In squid, more than half of the body is occupied by the mantle cavity, into which it collects water, then throws it out through a narrow opening, at the same time acquiring a streamlined shape, due to this, they can move at a speed of up to 70 km per hour.