Bioluminescence Animal coloration

a euplokamis comb jelly bioluminescent.

bioluminescence production of light, such photophores of marine animals, , tails of glow-worms , fireflies. bioluminescence, other forms of metabolism, releases energy derived chemical energy of food. pigment, luciferin catalysed enzyme luciferase react oxygen, releasing light. comb jellies such euplokamis bioluminescent, creating blue , green light, when stressed; when disturbed, secrete ink luminesces in same colours. since comb jellies not sensitive light, bioluminescence unlikely used signal other members of same species (e.g. attract mates or repel rivals); more likely, light helps distract predators or parasites. species of squid have light-producing organs (photophores) scattered on undersides create sparkling glow. provides counter-illumination camouflage, preventing animal appearing dark shape when seen below. angler fish of deep sea, dark hunt sight, contain symbiotic bacteria in bait on fishing rods . these emit light attract prey.