Animals that lack a vertebral column, or backbone, are known as invertebrates. Invertebrates make up the vast majority of animal species on Earth, with estimates suggesting that they make up over 97% of all animal species. These creatures come in a wide range of shapes and sizes, from tiny insects to massive jellyfish.

One of the most well-known groups of invertebrates are arthropods, which include insects, spiders, and crustaceans. Arthropods are incredibly diverse and can be found in nearly every habitat on Earth. They play a crucial role in ecosystems, serving as pollinators, decomposers, and prey for larger animals.

Another group of invertebrates are mollusks, which include creatures like snails, clams, and octopuses. Mollusks are known for their soft bodies and hard shells, which provide protection from predators. Some species of mollusks are important food sources for humans, while others are prized for their beautiful shells.

Other examples of invertebrates include echinoderms, such as starfish and sea urchins, and cnidarians, such as jellyfish and coral. These creatures have unique adaptations that allow them to thrive in their respective environments, from the depths of the ocean to the heights of the mountains.

Despite their lack of a backbone, invertebrates are incredibly successful and have been able to adapt to a wide range of environments. They play a vital role in ecosystems, helping to maintain the balance of nature and serving as food sources for other animals.

In conclusion, invertebrates are a diverse and fascinating group of animals that lack a vertebral column. From insects to mollusks to jellyfish, these creatures come in all shapes and sizes and play important roles in ecosystems around the world. By studying and conserving invertebrates, we can learn more about the natural world and ensure that these vital creatures continue to thrive for generations to come.

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