Invertebrates are animals that do not have a backbone or spinal column. This vast and diverse group of organisms includes insects, spiders, crustaceans, mollusks, and worms, among many others. Invertebrates make up the majority of animal species on Earth and play crucial roles in ecosystems as predators, pollinators, decomposers, and more. Research on invertebrates covers a wide range of topics, including their anatomy, physiology, behavior, ecology, evolution, and conservation. Scientists study invertebrates to better understand their biology, interactions with other species, and responses to environmental changes. This research is important for informing conservation efforts, pest management strategies, and the overall health of ecosystems.