Invertebrate zoology is a specialized field of biology that focuses on the study of animals without a backbone, such as insects, mollusks, and worms. This field includes the identification, classification, anatomy, physiology, behavior, and ecology of these organisms. It also involves investigating the relationships between different invertebrate species and their interactions with other organisms and the environment. Invertebrate zoologists use a variety of research methods, including microscopy, dissection, observation in the field, and molecular techniques. Their findings help to advance our understanding of the diversity and evolutionary history of invertebrates and their importance in ecosystems.