Source: The Great Lakes Triangle book by Jay Gourley, page 46. (Published in 1977 by
Fawcett Publications, Inc., Greenwich, Connecticut)
Ancient Chippewa superstition describes a giant sturgeon in Lake Superior. The huge legendary fish is capable of swallowing a whole ship. It can, with the flick of a fin, churn into boiling violence a small spot on the surface of the lake. Many Chippewa braves have seen either the fish or clear evidence of it.
The fish has not been seen by a white man who has lived to report it.