Arvid Blumenthal (* 19 March 1925 in Dundaga, Latvia; † 13 October 2006 in Australia), also known as Crocodile Harry, was a Latvian-Australian crocodile hunter, writer and well-known resident of the town of Coober Pedy. He was one of the models for the main character in the Crocodile Dundee film series.
Blumenthal grew up in Latvia; in 1942 he joined the Latvian army in World War II and was taken prisoner by the US. After the war he emigrated to Australia, where he arrived in 1951. From 1956 he worked as a crocodile hunter in Queensland, killing more than 40,000 crocodiles and selling the meat. In 1975 he retired to Coober Pedy. His cave home there became a tourist attraction and film set.