A zoologist was a scientist that studied animals.
Bracebridge Hunz was an entertainer and a celebrated zoologist in Victorian London. He . (PROSE: The Lampblack Wars)
Professor Vittorio Levi was a zoologist, botanist, astronomer, anthropologist and amateur space traveller, and also a colleague and friend of the Doctor. He, Sarah Jane Smith and the Fourth Doctor travelled to the planet Aquatica where they were taken hostage by Medusians. (PROSE: War on Aquatica)
Luis Vittorino was a zoologist who directed the removal of the Hammies skeletons. (PROSE: The Tree of Life)
Dr Smith was brought to Zamper to research why the productivity of the Zamps had been decreasing for the last couple of decades. (PROSE: Zamper)