Marine mammal and seabird observations from the Applied California Current Ecosystem Studies program are now available through the CeNCOOS Data Portal. ACCESS was formed in 2004 as a multidisciplinary collaborative between Point Blue Conservation Science, Cordell Bank National Marine Sanctuary and Greater Farallones National Marine Sanctuary. It supports marine wildlife conservation and healthy marine ecosystems in northern and central California through scientific research that informs resource managers, policy makers and conservation partners. These data were acquired during ACCESS research cruises in 2004 and 2005, when visual surveys of the air and water were conducted. All seabirds and marine mammals observed were taxonomically identified to the species level, and the density of each species observed was reported.