As a forensic expert with experience in the field of decomposition studies, I can provide insight into the process of decomposition when a body is submerged in water. Decomposition does occur in water, but the process can be significantly different from that on land. The rate and manner of decomposition are influenced by various factors, including water temperature, water currents, depth, and the presence of marine life. Cold water can indeed slow down the decomposition process. This is because lower temperatures generally reduce the metabolic activities of bacteria and other microorganisms responsible for decomposition. Additionally, cold water can lead to the formation of adipocere, a waxy substance that forms from the body's fats. Adipocere can help to partially protect the body from further decomposition. In very cold waters, bodies have been found to be almost completely intact after several weeks, and recognizable as skeletons even after five years. However, it's important to note that decomposition in water can still occur, albeit at a slower pace, and the presence of marine life can also contribute to the breakdown of tissues. In warmer waters, the decomposition process can be accelerated due to higher bacterial activity. Additionally, the movement of water can cause the body to move and thus be exposed to different environmental conditions that may affect the decomposition process. In summary, while bodies do decompose in water, the process is influenced by the water's temperature and other environmental factors, which can either slow down or speed up the rate of decomposition. read more >>

Cold water also encourages the formation of adipocere. This is a waxy, soapy substance formed from the fat in the body that partially protects the body against decomposition. Bodies have been retrieved almost completely intact from waters below 7��C after several weeks, and as recognisable skeletons after five years.read more >>