Environmental health, Public health, Conservation of Natural Resources - methods, Ecosystems, Fisheries management, Parasites, Microbiology, Mollusks, Animal Ecology, Medicine & Public Health, Water and Health, Proctoeces lintoni parasite, growth rings, rocky intertidal, Fissurella spp, MEABR, human harvesting, Trematoda - pathogenicity, Trematode Infections...