"Adult jellies (medusae) reproduce sexually resulting in larva (or planula). After a period of drifting, the planula will settle on any and evey available surface becoming a stationary polyp that can clone itself. Each polyp, resembling aptasia anemonies, will begin to bud-off a small, free swimming medsua called a ephyra.
"Four little ephyras came home with me that night. Six more were to follow the next day. It's been three weeks now and all ten are with me and growing fast. The largest is now 7/8" across the bell."