Why would shipwreaks be preserved better in deeper water than in shallow water?

Shipwrecks are preserved better in deeper water due to lower levels of light, which slows down the growth of harmful microorganisms and algae that can accelerate decay. Additionally, deeper waters often have colder temperatures and higher pressures, which contribute to the preservation of materials like wood and metal. In contrast, shallow waters are more susceptible to environmental factors such as wave action and sediment disturbance, which can lead to faster erosion and degradation of wrecks.