Explains the characteristics and classification of:
- Insects
- Arachnids
- Centipedes and Millipedes
- Crustaceans
- Jellyfish
- Sea Anemones and Corals
- Sea Stars, Feather Stars, and Others
- Sea Cucumbers, Urchins, and Sand Dollars
- Octopuses, Squid, and Nautilus
- Clams, Snails, Slugs, and Others
- Sponges
- Segmented Worms
- Roundworms
- Flatworms
