Fireflies light up due to bioluminescence: the ability of living organisms to convert chemical energy to light energy. Bioluminescence is also exhibited by some fungi, mollusks, and worms, and bioluminescent fish are common in the ocean’s depths, likely because the light aids in species recognition in the darkness. Other animals use luminescence in courtship and mating, to divert predators, or to attract prey. Why is most marine bioluminescence in the blue and green part of the spectrum? Discuss
Source: The Free Dictionary