Peter Colin Young (born 9 February 1940) is a British-born ichthyologist and parasitologist who spent most of his career in Australia.
[2] He had originally planned to study the ecology of Monogenea trematodes and their hosts, but, finding that so many of his specimens were undescribed, decided to become a taxonomist instead.
[2] After completing his PhD, Young became a Scientific Officer at the Commonwealth Bureau of Helminthology at St Albans, England, studying ascaridoids in fish and marine mammals.
[2][3] At the 1969 Oceanology International Conference, he presented a joint paper on the "cod worm" (Terranova) and its potential risks to public health.
[2] His research showed that male lethrinid fish (tropical emperors) are larger than females due to sex change, and not because of differential growth rates.
[3] Between September 1984 and January 1985, Young was Officer-in-Charge of CSIRO's Division of Fisheries at Cronulla Marine Laboratories in Sydney.