Just like plants on land, ocean-going plankton need light from the sun to prosper and grow. But light is absorbed by ocean water, and some colors of light are absorbed more readily than others.That's why nearly all photosynthesis in the ocean takes place in the sunlit upper layers.
Pattern of dark lines or bands that occurs when electromagnetic radiation is passed through an absorbing<span> medium into a spectroscope</span>
The purpose is to taste test it obviously
