| specifically this quote :
Thus, any potential deficit in carbon and all deficit in nitrogen must be met by heterotrophy (feeeding). All corals studied can potentially meet all of their carbon and their nitrogen requirements by feeding alone. Thus, arguably, feeding is more important to coral's maintenance, growth, and reprodution than light. Its just that light is a plentiful resource in clear shallow tropical waters, and in practice, most corals get most of their carbon from light (practically energetically free to obtain) than by feeding (energetically costly to obtain).
__________________ Robert  My Cube “A spirit is manifest in the laws of the Universe—a spirit vastly superior to that of man, and one in the face of which we with our modest powers must feel humble.” Albert Einstein |