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  An ichthyologist is a scientist who studies fish. Ichthyologists work in a variety of specialties and for a variety of organizations. They perform taxonomy, which consists of identifying and classifying fish, for museum collections, and they teach and perform research at universities. They work for environmental and government organizations to study fish in relation to their environmental habitats and learn how to better conserve them. Other specialty areas ichthyologists work in include behavior, breeding, public and private aquarium maintenance and more.

Museum ichthyologists identify and classify fish species, perform research and collect data. Many ichthyologists specialize in freshwater or marine fish or certain subsets of those groups. An ichthyologist might work in the field, traveling to different parts of the world to collect specimens. Preservation of collected fish is also an important part of the work that a museum ichthyologist might do. University ichthyologists teach undergraduate and graduate-level courses in biology, ichthyology, ecology and more, perform research projects and publish papers on their findings.

Ichthyologists in conservation specialties work for government agencies, environmental groups and other organizations. They conduct research relating to fish populations and management. They produce guides and catalogs of fish and fish larvae in specific geographic areas, and they prepare environmental impact reports.

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