1) The document discusses the structures and life cycles of simple aquatic invertebrate animals including sponges, jellyfish, hydra, and moon jellyfish.
2) It describes how sponges filter feed through pores and reproduce sexually or asexually, and how jellyfish have radial symmetry and can reproduce sexually or through budding polyps.
3) Details are provided on the hydra, a small freshwater animal that can reproduce asexually through budding or sexually, and facts are given about the moon jellyfish and box jellyfish.
