When he hit the water he either was sucked under the ship and went thru the propellers then eaten by all the small critters or sharks got to him.
Also depends on a number of factors but jumping from the height of most cruise ships main deck could easily kill a person upon impact with the water alone.
I have never believed in the “being sucked under and into the props” theory. I have also never seen an example of it happening, or a reputable story about it happening.