Are sharks found in Hudson bay?

No there have not been any documented sightings of great whites in Hudson bay. There have been ( very rare) documented sightings of nurse sharks and Greenland sharks ( capable of growing to a size able 7 meters ( 23 ') very little is known about the Greenland shark. A specimen was found with a polar bear jaw in Norway , but it's unknow whether it was captured or scavenged. Greenlands have been confirmed in shallow waters in the St Lawrence and even caught ice fishing in connected lakes in quebec. The porbeagle shark, a cold water shark may be in Hudson Bay.