animals with backbones
vertebrates and invertebrates
Worms make up the largest group of complex invertebrates.
invertebrates
invertebrates
Invertebrates do not have backbones.Examples of invertebrates are earthworms,insects,squids etc... Invertebrates are paraphyletic group.
The smallest group of invertebrates are sponges. They live in the ocean, fresh water ,lakes. and streams. Some things attach themselves to other things so they can get food.
Octopods.
Crustacean
mollusks :)
insects
Beetles are invertebrates
aracinaids