How does sunlight that penetrates seawater affect marine life in the hydrosphere

Explanation:

The sunlight that penetrate seawater has great effect on Marin life. Organism that lives beneath the Marine water absorb light. If the sun penetrate Marine water, plants and algae use the light energy from sun light with carbondioxide and water to undergo photosythesis to produce food. The food produced in the marine habitat can be consumed by some marine organisms in the seawater which are somehow herbivores. Sunlight ensures sustainability of lives in seawater and without sunlight plants and algae cannot produce food which is essential for survival of marine life.