Very few fish come off of the bottom. Most are suspended 2-5′ above bottom. Don’t really know what the water temp is. We’re catching them through the ice. They’re all pretty big fish 12-15″. I have never seen one with a bladder in it’s mouth, they’re just not that deep. The thing that makes me wonder is some fish that we keep have those bloody mouths when they’ve been on the ice for a while. I always give them a good start down the hole and they all seem to really take off. With the Livescope I can see some of them go back down if they are still in the cone.