Perkinsus organisms are a group of protistan (single-celled) parasites that can infect shellfish, especially bivalve molluscs, in various parts of the world, reports Denie Petty from the University of Florida IFAS Extension.
Research by Sandra Bravo, from the Aquaculture Institute at the Universidad Austral de Chile, has identified that sea lice Caligus rogercresseyi, a Caligidae species not previously documented, occurs widely in both the South of Chile and Southern Argentina.
