"Sixteen beluga whales and 15 ringed seals from the western Arctic region of Canada were examined for giardiosis and cryptosporidiosis... Giardia sp. cysts were identified in three of 15 (20%) seals, implicating them as a potential reservoir for this zoonosis in the arctic. Cysts of Giardia sp. were also detected in feces from 20 of 74 (28%) seals examined from the eastern coast of Canada..." From "Zoonotic protozoa in the marine en...ic health"

Another argument against eating raw fish, I guess...

Sue