No specific information about the longevity of Somniosus microcephalus exists. Some scientists speculate that these sharks may live in excess of 100 years. ("Greenland Shark, Elasmobranch Research, and Education Group", 2005)
Tanya Dewey, Animal Diversity Web, University of Michigan Museum of Zoology
Kevin Wehrly, University of Michigan
Patrick Mills, University of Michigan
Mills, P. and K. Wehrly. 2006. "Somniosus microcephalus" (On-line), Animal Diversity Web. Accessed October 03, 2010 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Somniosus_microcephalus.html.