Crabs are classified as invertebrates. Unlike vertebrates, which possess a backbone or spine, invertebrates lack this structure. Crabs belong to the phylum Arthropoda, specifically the class of crustaceans.
Invertebrates make up a vast majority of animal species on Earth, and they exhibit a wide range of physical forms and adaptations. Crabs are characterized by their hard exoskeleton, jointed limbs, and segmented bodies. This tough exterior helps protect them from predators and harsh environments.
In summary, crabs are invertebrates, and understanding their classification helps us appreciate the diversity and complexity of life in our oceans and rivers.