Does a jellyfish have skeleton?

No, jellyfish do not have a skeleton in the traditional sense. They are hydrostatic skeletons. This means they use water pressure within their bodies to maintain their shape and provide support.

Here's how it works:

* Mesoglea: Jellyfish have a thick, jelly-like layer called mesoglea that makes up most of their body. This layer is filled with water.

* Muscle Contraction: Muscles within the jellyfish's body contract, squeezing the water in the mesoglea. This creates pressure, giving the jellyfish its shape and allowing it to move.

* Flexibility: The hydrostatic skeleton allows jellyfish to be very flexible, allowing them to move gracefully through the water and even squeeze through tight spaces.

So, while jellyfish don't have bones, they have a clever and efficient system for support and movement!