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Ctenophora, also known as comb jellies, are a phylum of marine animals characterized by their gelatinous bodies, radial symmetry, and eight rows of cilia, called comb rows, used for locomotion. They capture prey with sticky cells called colloblasts. General Characteristics of Phylum Ctenophora: 1) Habitat: All species are marine; either solitary or colonial. 2) Symmetry: They have biradial symmetry, … Read more
Cnidaria is a phylum of aquatic animals that includes jellyfish, corals, and sea anemones. They have radial symmetry, a simple digestive cavity, and specialized stinging cells called cnidocytes for capturing prey and defense. General Characters of Phylum Cnidaria: 1) Habitat: Mostly aquatic or marine habitat, solitary or colonial. 2) Symmetry: Body is radially symmetry. 3) Germ Layer: … Read more
Porifera (Sponges) (L. porous=pore; ferre=bearer) Porifera, or sponges, are simple, non-motile animals that live in aquatic environments. They have porous bodies and a canal system through which water flows, allowing them to filter feed on small particles. General Characters of Phylum Porifera 1) Habitat: They are aquatic organisms generally marine, with a few freshwater species. 2) Symmetry & … Read more