Developmental stages of fish blood flukes, Cardicola forsteri and Cardicola opisthorchis (Trematoda: Aporocotylidae), in their polychaete intermediate hosts collected at Pacific bluefin tuna culture sites in Japan
Sporocyst and cercaria of Cardicola opisthorchis are described. Sporocyst and cercaria of Cardicola forsteri are described. Phylogeny of the polychaete hosts of blood flukes of marine teleosts is discussed.