The largest group of invertebrates, including insects, spiders, crustaceans, and their relatives. Known for their jointed legs and segmented bodies.

Diverse group including snails, clams, octopuses, and squid. Most have a soft body and many possess a hard shell for protection.

Including echinoderms like starfish, various types of worms, jellyfish, and countless other species that make up 97% of all animal life.