Young jellyfish that attach to the sea floor and grow into adult jellyfish.
Scyphistomas are small and grow into something bigger and more beautiful.
Examples:
The scyphistomas attach to the sea floor and grow into adult jellyfish.
The scyphistomas are small jellyfish that grow into big ones.
When the scyphistomas grow up, they become adult jellyfish.
The scyphistomas are like baby jellyfish that grow into grown-up jellyfish.
The scyphistomas start small, but they become big and beautiful jellyfish.
The scyphistomas are the beginning of jellyfish, like when a baby is the beginning of a grown-up person.