KnowraCounterilluminationLinked fromLinked fromThe 18 pages that link to Counterillumination, each with the reason it gives.All 18Broader topic 3Related 13Compared with 2CountershadingCompared with: Both can conceal aquatic animals, but counterillumination adds light while countershading uses pigment.Vampire squidCompared with: Unlike many counterilluminating animals, it uses light chiefly in defensive displays.