With only two pics it is hard to see the reason BUT there are no flame scars. This looks more like a compressed air or maybe a propane detonation. Maybe a poor construction because not much on the boat was displaced. Could have been a methane from the fish holding tank? Some gas build up down in the bilge?
Just weird the way it split the top half from the bottom without much other damage.
Just weird the way it split the top half from the bottom without much other damage.