Final answer:
The organism in the question is indeed in the medusa phase of its life cycle, which is the sexual stage characteristic of certain Cnidarians, especially scyphozoans like jellyfish. The medusa is free-swimming and responsible for the production of gametes.
Step-by-step explanation:
If we refer to an organism that is currently in the medusa phase of its life cycle, we are discussing a life form that has two stages in its life cycle: a polyp stage and a medusa stage. This is characteristic of certain Cnidarians, specifically scyphozoans (jellyfish). In their life cycle, these organisms exhibit both the medusa and the polyp forms, with the medusa typically being the sexual stage responsible for producing gametes, while the polyp serves as the asexual phase. In the medusa stage, jellies possess a bell-like morphology and are free-swimming, usually through the contraction of a ring of muscles around the bell. This phase is the dominant stage in scyphozoans, and Scyphozoa includes all marine jellies. They have separate sexes with the gametes formed in the gastrodermis and released through the mouth.