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Ichthyology is the branch of zoology dedicated to the study of fish, both extant and extinct species. This discipline encompasses the anatomy, physiology, behavior, ecology, and evolution of fish, as well as their classification, identification, and conservation. Ichthyologists may specialize in certain groups of fishes, such as sharks or bony fishes, and they often collaborate with other marine biologists, wildlife biologists, and paleontologists to better understand the role of fish in aquatic ecosystems and the impacts of human activities on their populations. By examining the adaptations and diversity of fish species, ichthyology also contributes to our understanding of biodiversity, evolution, and the origins of life on Earth.