Why few kinds of fish live on the ocean floor?
Sting rays and I don't know anything els
Most phytoplankton are far too small to be seen individually with the human eye. Phytoplankton, like plants, get energy from a process called photosynthesis, and must live in the well-lit surface layers of an ocean, sea, or lake. Some kinds of zooplankton feed on phytoplankton and so do shellfish that live on the ocean floor. Many filter fish also eat it as they cruise the waters.