Sharks are known hosts to hundreds of different species of tapeworm parasites. However, we know little about their transmission pathways. Krill and other small crustaceans are keystone species, meaning they are essential to support the biomass of many top marine predators. However, are they the first intermediate hosts for these shark parasites? Using molecular tools, this study will elucidate the role these tiny, yet abundant, organisms play in the transmission of shark tapeworms.