"The Wild River, though it was a white water stream, would have served for a double drive; but it was alive with cougarfish, a species resembling the catfish of the Mississippi; but the cougarfish were larger and incomparably more savage and had claws on their tails. Careful Paul Bunyan would not risk his loggers among them..."
Paul and his men would eventually settle in the "Twin rivers county." But there are too many places named "twin rivers" across America and Canada to say which twin rivers it is for certain) Later, This "cougar fish" was included in a bestiary proper, "Paul Bunyan Natural History [C.E.Brown 1935]" it is also the only critter given an illustration in the book, appearing on the cover. – the entry for Cougarfish goes as follows:
"COUGAR FISH. This savage fish, armed with sharp claws, lived in the Big Onion River. It was the cause of the disappearance and death of many river drivers, whom it clawed off the logs and beneath the water. Paul Bunyan offered a big reward for their capture and extermination, but the fish heard of it and stayed away. None were taken...
All of that said, the cougar fish should not be confused with other fabulous fish: various "half-feline-half-fish" critters such as the "Tom-Cod", the cougar-like "Mountain Catfish." "purrmaids" or muddled with fur covered fish such as the "fur-bearing trout." - Nor should it be confused with the very real giant blue catfish or the flathead cat-fish!
• See Also: Paul Bunyan Natural History. • Similar Yokai: Onamazu.