That is insane!
That’s a 75 foot boat. Could easily hold more people than that.
Whatever it was it took the two top cabins off with probably explosions. The initial reports were that the crew slept on top and were awake at the time. Maybe they were getting ready for an early morning dive and possibly preparing breakfast for the passengers and something went wrong in the galley.
34 passengers is quite comfortable on the Conception. Its bigger that it looks in the pic. Its Coast Guard rated to carry 46 but 34 is easier on crew and passengers. Its plenty big enough