Here's a video of divers getting right up close to the fuselage. You can get an appreciation of how difficult it is for the recovery team to enter the fuselage and search for bodies given the poor visibility and limited sunlight reaching down to that depth. On top of that, you have a tangled web of wreckage, metal fragments, cables and wires to deal with. The footage also shows what appears to be the top of the left wing (with spoiler still deflected up) where the over wing emergency exits are.