Mountain Cavum dragon

The Mountain Cavum dragon is a cumbersome beast. Using it's angler it sits and waits, luring in its prey.  This stationary way of hunting will eventually become permanent. It would become completely immobile, submerged, with only it's angler above the surface. It has earned the name "trapdoor drake" because of this adaptation. Lunging from beneath the surface to completely vanish with its prey securely viced within its jaws.