Invertebrates are animals that do not have a backbone, meaning they lack an internal bony skeleton. They make up the vast majority of animal species on our planet and are found in a wide variety of shapes and sizes.
Invertebrates include groups such as insects, mollusks, crustaceans, worms, and jellyfish, among others.
Despite their diversity, they share the common characteristic of not having a backbone and rely on external structures or softer skeletons to maintain their shape and protect their internal organs.
