I believe I have heard it is because the light comes from above, and so the pigments are more concentrated from that angle.
This is why. Corals make pigment to protect from UV rays. Obviously the UV rays are coming from above, so the most pigment will be seen when viewing from that direction.
Light your corals from the side, and they will color up on that side.
09-17-2009, 01:19 PM
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