We just learned about the Amebocyte that lives inside a jellyfish.
Another interesting thing about Jellyfish is the Jellyfish Polyps.
When Jellyfish have babies, they are usually like little tubes that just float in the water and try to find something to stick on to.
They look a lot like other hydrozoans and even coral when they are growing up.
These little baby jellyfish are called polyps.
(from: wikipedia - polyp)
Kid Facts - Blast from the past: Octopus - Three Hearts