The Occurrence of Sarcotaces in Canada

A parasitic copepod, encysted in the abdominal cavity and in the muscles of the red snapper, Sebastodes ruberrimus, caught off the Pacific Coast of Canada, has been identified as Sarcotaces arcticus. Each cyst contained one female and one male copepod and had an opening through the skin of the fish by which, no doubt, the nauplius larvae are discharged.