The level of light can shine through the water.
The light that we can see is divided into 7 colors. Ex Violet, indigo, blue, green, yellow, orange and red. 7 colour mix is white . Light are important to the sea. Ex Coral and seagrass use light to synthetic food. The color of the light shines into the deep sea is a purple light. The red light can shine down on the sea was minimal.