[PDF] Reversing the Life Cycle: Medusae Transforming into Polyps and Cell Transdifferentiation in Turritopsis nutricula (Cnidaria, Hydrozoa). | Semantic Scholar

This is the first evidence for back-transformation of sexually mature medusae into polyps in Aurelia sp.1, and reveals the underestimated potential of life cycle reversal in scyphozoanmedusae, with possible implications for biological and ecological studies.

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Besides their high regenerative and asexual-reproduction potential, a number of cnidarians can undergo ontogeny reversal, or reverse development: one or more stages in the life cycle can reactivate genetic programs specific to earlier stages, leading to back-transformation and morph rejuvenation.