Dave Gilson delves into what happens to a body buried at sea:
Results may vary depending on a burial spot's depth, temperature, and its abundance (or lack) of sea life. Generally, the deeper and colder the water, the slower bodies decompose. A 2008 paper in Forensic Sciences described the differing conditions of remains retrieved from two airplane crashes in more than 1,500 feet of water. A victim discovered off of Sicily 34 days after death was still fully dressed; a three-month-old body found off the southern coast of Africa had been "fully skeletonized" by "highly efficient necrophageous lyssianassids" (i.e., flesh-eating shrimp-like creatures).
The Dish 