So what ever happened with this?
Anyway, this evening I saw a bunch of carp trapped in a shallow backwater area. They appeared to be spawning. It was muddy enough and shallow enough that I would not be surprised if this water was 60 degrees or so. Then again, in these shallow pools they always look like they are spawning swimming in pods and panicking when the water gets too shallow. I may have to rescue them at some point.
And yes I would herd up carp and save them.