Invertebrates are one of the most amazing and diverse group of animals. They make up about 96% of all animal species, and are found in nearly every ecosystem on earth. Invertebrates come in a wide variety of shapes and sizes, from microscopic single-celled organisms to giant dinosaur-like creatures like the giant squid. Invertebrates are a unique group of animals due to their lack of a spinal column . Many invertebrates do not possess a skeleton, and will instead move around using muscles and specialized organs. This lack of a backbone makes them incredibly adaptable and capable of living in a wide variety of habitats. Invertebrates are also incredibly important to their ecosystems. As part of the food chain, they help recycle nutrients and play an important part in pollination. They also make for fascinating scientific studies due to the variety of ways they live and survive. With over a million known species, invertebrates continue to provide us with new and interesting insight into the animal kingdom.