Sunlight can penetrate into the ocean only up to a depth of ________.
Sunlight entering the water may travel about 1,000 meters into the ocean under the right conditions, but there is rarely any significant light beyond 200 meters.
The ocean is divided into three zones based on depth and light level. The upper 200 meters of the ocean is called the euphotic, or sunlight zone. This zone contains the vast majority of commercial fisheries and is home to many protected marine mammals and sea turtles.