Image: David Ryan
David Ryan at the Australian Museum, June 2009.
- Mark McGrouther
- © Australian Museum
David Ryan is an aquatic ecologist with Department of Water and Energy (DWE) in Parramatta, Sydney. He visited the Australian Museum in early June 2009 to examine specimens of Flathead Gudgeon, Philypnodon grandiceps and Dwarf Flathead Gudgeon, Philypnodon macrostomus.