I'll give 50 points and a brainlist answer to whoever writes me a introduction paragraph about jelly fish. in your own words

Jellyfish, an animal that can be found deep under the sea, that is common worldwide, has an interesting background and presence to the world. Roaming the seas for at least 500 million to 700 million years, they are one of the oldest multi-organ animals that can be found. Jellyfishes, however, are not really a true fish, but it is still used in the name. Instead, they are more known as "jelly". We will discover together their habitat, their Anatomy, and how they affect the ecosystem and humans themselves, and will learn at the end, how the jellyfish is like, and how to deal with them when one is sighted.

(is this good enough?)

hope this helps

next paragraph will be more indepth history of them, and expansion on its structures* just saying

It’s a hope that ; )