Melanie Lisa Jane Stiassny (born 17 January 1953 in Bielefeld, Germany) is the Axelrod Research Curator of Ichthyology at the American Museum of Natural History. Her research interests focus on freshwater biodiversity documentation and systematic ichthyology in the Old World tropics, including tropical Africa (especially in the Congo River) and Madagascar. She has published broadly on the biogeography conservation and systematics of teleosts.