Data set includes occurrence and genotypes of T. gondii and Cryptosporidium species found in central California coastlines. This dataset is associated with the following publication: Staggs , S., S. Keely , M. Ware , N. Schable, M. See , D. Gregorio, X. Zou, C. Su, J.P. Dubey, and E. Villegas. The development and implementation of a method using blue mussels (Mytilus spp.) as biosentinels of Cryptosporidium spp. and Toxoplasma gondii contamination in marine aquatic environments. Parasitology Research. Springer, New York, NY, USA, 114(12): 4655-4667, (2015).