Body plan: Simple, porous bodies without true tissues or organs.
Habitat: Mostly marine, some freshwater.
Example: Sycon and Spongilla.
Body plan: Radially symmetrical with stinging cells.
Habitat: Mostly marine.
Example: Hydra, jellyfish
Body plan: Dorsoventrally flattened, bilaterally symmetrical, and triploblastic.
Habitat: Free-living or parasitic.
Example: Tapeworms and planarians.
Body plan: Cylindrical, unsegmented bodies.
Habitat: Terrestrial, aquatic, or parasitic.
Example: Ascaris and hookworms.
Body plan: Segmented, cylindrical bodies.
Habitat: Marine, freshwater, and moist terrestrial environments.
Example: Earthworms and leeches.
Body plan: Segmented bodies, jointed appendages, and a hard exoskeleton.
It is the largest phylum.
Habitat: All types of environments.
Example: Prawn, crabs, and spiders.
Body plan: Soft-bodied, often with a protective calcareous shell. Second-largest phylum.
Habitat: Terrestrial and aquatic.
Example: Snails, octopuses.
Body plan: Adults have pentamerous radial symmetry, Spiny skin.
Habitat: Exclusively marine.
Example: Starfish, sea urchins, and sea cucumbers.
Body plan: Bilaterally symmetrical, with a notochord, dorsal hollow nerve cord.
Habitat: Diverse, includes aquatic and terrestrial environments.
Key feature: Includes all animals with a backbone (vertebrates), such as fish, amphibians, reptiles, birds, and mammals.
Example: Humans, fish, and birds.