👉 Deepwater is a type of water that is over 3,500 feet (1,069 meters) below sea level and extends up to 20 miles (32 kilometers) offshore. It is characterized by its high salinity (salt content), which is typically around 80% or more. Deepwater ecosystems are often characterized by a unique combination of marine life, including large fish such as blue whales and humpback whales, and small aquatic animals that include