Quoted By:
Dunkleosteus mon or fossil mon when?
"This mechanism allowed D. terrelli to both achieve a high speed of jaw opening, opening their jaws in 20 milliseconds and completing the whole process in 50–60 milliseconds, comparable to modern fishes that use suction feeding to assist in prey capture and produce high bite forces when closing the jaw, estimated at 6,000 N (1,350 lbf) at the tip and 7,400 N (1,660 lbf) at the blade edge in the largest individuals."
Make it physically bulky with high physical attack. Then give strong jaw and a priority bite move.