This video lecture from Kingdom Animalia (F.Sc. First Year Biology) covers Phylum Cnidaria (radially symmetrical animals). Body structure, organs and organ systems, feeding behavior, and reproduction in phylum Cnidaria have been discussed in detail. The lecture also elaborates alternation of generation, life cycle, and polymorphism in the phylum. Representative members of the phylum have been discussed with emphasis on Corals. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.