I saw that streak and thought it a distant edge-on galaxy. I expected a little more movement from the asteroid.

I saw big snappers like that while fishing for muskie and walleye in Ontario. We pretty much left 'em alone, but there were guys who were there just for the turtles. They would brave the black flies at dusk and mosquitos at night and slowly troll their way through the narrow channels and streams which fed the lake. I really don't know the technique or types of traps but they occasionally came back in the mornings with some huge ones.