Shipwreck sites are locations where ships have sunk or been destroyed, often due to natural disasters or human error. Seabeds and reefs are two common types of shipwreck sites. Seabeds are the ocean floor, which can be a hazardous environment for ships due to strong currents and hidden obstacles. Reefs are shallow areas of water with coral or rocks that can cause ships to become stuck or damaged. Shipwrecks in these areas can be difficult to locate and explore due to their depth and the presence of dangerous marine life.