Jellyfish have no bones so fossils are hard to come by, but scientists have evidence that these creatures have been bobbing along in the world's oceans for around 650 million years or even longer.

How many bones a jellyfish has?

Jellyfish have no bones, so fossils are hard to come by. Nevertheless, scientists have evidence these creatures have been bobbing along in the world's oceans for at least 500 million years.

Is jellyfish dont have bones?

Jellyfish have very simple bodies -- they don't have bones, a brain or a heart. To see light, detect smells and orient themselves, they have rudimentary sensory nerves at the base of their tentacles. A jellyfish's body generally comprises six basic parts: The epidermis, which protects the inner organs.