The key difference between Cnidaria and Ctenophora is that the cnidaria show alteration of generation between medusa and polyp, while Ctenophora does not show alteration of generation; only medusa form is present. Phylum Coelenterata is a subdivision of Kingdom Animalia. It consists of two main phyla Cnidaria and Ctenophora and approximately 15000 species included. They […]