[ik-thee-ol-uh-jee] 
| the branch of zoology dealing with fishes. |
| ich·thy·ol·o·gy (ĭk'thē-ŏl'ə-jē) n. The branch of zoology that deals with the study of fishes. ich'thy·o·log'ic (-ə-lŏj'ĭk), ich'thy·o·log'i·cal adj., ich'thy·ol'o·gist n. |
ichthyology
scientific study of fishes, including, as is usual with a science that is concerned with a large group of organisms, a number of specialized subdisciplines: e.g., taxonomy, anatomy (or morphology), behavioral science (ethology), ecology, and physiology. Because of the great importance of fishes as human food, economic ichthyology is a significant segment of the field
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θiˈɒl