How does a body decompose under water?

Underwater decomposition occurs in stages, beginning with autolysis, where cells break down due to enzyme activity. This is followed by putrefaction, where bacteria and microorganisms proliferate, leading to the production of gases and the breakdown of tissues. The cold temperature and lack of oxygen in water can slow down decomposition compared to land, but aquatic scavengers, such as fish and invertebrates, can accelerate the process. Factors like water temperature, depth, and salinity also significantly influence the rate of decomposition.