Gerald Robert "Gerry" Allen (born March 26, 1942https://www.californiabirthindex.org/birth/gerald_robert_allen_born_1942_2425032 in Los Angeles, California) is an American-born Australian ichthyologist. His career began in 1963, when he spent a semester at the University of Hawaii, where he also received a PhD in marine zoology in 1971. In 1972, Allen wrote his doctoral thesis on the systematics and biology of the anemone fish.
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