Perrin, W.F.; Würsig, B.; Thewissen, J.G.M. (2009). Encyclopedia of marine mammals. Second edition. Academic Press: London. ISBN 978-0-12-373553-9. xxix, 1316 pp. (look up in IMIS) [details]
The Galapagos fur seal (A. galapagoensis) is the smallest of the southern fur seals (and the Otariidae) with mean female and male adult mass at 27 kg and 64 kg, respectively.