noun
cetology
The scientific study of whales, dolphins, and porpoises.
彼はクジラ学の研究者として世界中の海を調査している。
As a cetology researcher, he surveys oceans around the world.
Synonym for cetology; 鯨類学 is a more formal term using 類 (category), while クジラ学 is a simpler, more common compound.
Compound of クジラ (whale) and 学 (study, -ology). The exact historical derivation is uncertain, but it follows the common pattern of naming scientific disciplines.