Abstract
The 1st International Workshop on Symbiotic Copepoda (IWOSC) was held from 4–8 December, 2010, at Cabrillo Marine Aquarium (CMA) in San Pedro, California, U.S.A. We, along with Kazuya Nagasawa of Hiroshima University, Japan, organized the workshop. Ju-Shey Ho of California State University Long Beach, U.S.A., Geoff Boxshall of The Natural History Museum, U.K., and Rodrigo Johnsson of Universidade Federal da Bahia, Brazil, served as tutors.