Helene Denise Marsh (born 8 April 1945) is an Australian scientist who has provided research in the field of Environmental Science, more specifically Zoology and Ecology.
The focal point of her research has been the biology of dugongs, with particular foci in the areas of population ecology, history, reproduction, diet, and movements.
Marsh's parents always encouraged her to succeed academically, placing value on learning and education throughout her childhood, and expected that all three of their children would eventually attend a university.
[2] Her mother started out as a teacher, then when World War II began she enlisted and became the only woman education officer in the Army from Northern Territory.
The majority of Marsh's research involves the ecology and conservation biology of dugongs and other megafauna, providing advancements in the understanding, management, and care of coastal marine mammals.