Jellyfish can often be found in our seas; they are not lethal species, but with their stinging tentacles they can ruin our vacations.
To avoid this, it is advisable, of course, not to swim if there are jellyfish in the sea, unless there are very few.
You can use an antimedusa protective cream: the most common ones make the skin slippery, so it is difficult for them to cling and release the stinging liquid.
Jellyfish move vertically, they may stay on the surface, but they can also go down to the bottom; they move continuously and often go where the sea currents take them.
For this very reason, there are no strict rules to avoid them; zigzagging is often recommended, but it is not certain that these animals cannot still hit us.
Of course, the number one enemy is fear; if you happen to spot any jellyfish in the sea, it is necessary to keep calm and return to the beach immediately.