Did a coral spends their adult lives as Medusa?

Corals do not spend their adult lives as medusae. Instead, they primarily exist as polyps, which are sessile, cylindrical forms that attach to the substrate and form coral reefs. The medusa stage is typically associated with the life cycle of jellyfish, which are part of the same phylum, Cnidaria, but corals do not develop into medusae in their adult form. Some corals may have a medusa stage in their reproductive cycle, but they predominantly remain as polyps throughout their lives.