Jellyfish
Jellyfish are not aggressive animals, they don’t have any control over their stings, but they can be deadly to humans.
Jellyfish are beautiful creatures that are in abundance in the oceans and seas around the world, and have been for over 650 million years.
But jellyfish are not fish at all.
In fact, jellyfish are considered plankton (typically thought to be almost microscopic) because they cannot swim against a current.