Medusa
Medusa explained in an easy to understand way:
Imagine trying to keep a bunch of balloons from floating away at a party. This situation is similar to how a medusa, like a jellyfish, moves effortlessly through the ocean currents. Just as you need to hold onto the strings of the balloons to control their movement, a medusa uses its umbrella-shaped body to propel itself and navigate the water, with its tentacles trailing behind like the strings, capturing whatever 'floats' by.
Practice Version
Medusa: An umbrella-shaped free-swimming organism, like a jellyfish or hydra. Medusa. In simple terms, medusa is the life stage of some sea creatures, like jellyfish, where they are free-swimming and umbrella-shaped.