So you saw Chuck Norris out surfing and decided to run him down (extreme but in light of the Taranaki video... justified)... the results were not what you expected.....rookie error!
What I see as most interesting is the Center US box fin broke at the front tab, the slot box fin looks intact , Barr red paint on the tip, and some superficial damage. The slot box looks ok, screws ...?.
Must have been a shallow area, rider error in depth calculations perhaps
For US Box fins get a bunch of these from K4: www.k4fins.com/product/k4fin-us-bolt-plate/
Fin plate with brass inserted into plastic. When you hit something it simply rips the the insert out of the plastic plate. Very little damage to the fin. And definitely no damage to the board... that is unless you have the fin so far back it get's rammed into the board.