Mandarinfish is a little tiny poisonous and stinky fish in the ocean that produces blue pigment, he attracted by a very attempting grooming light from the deep darkness fluid. It is a monkfish trap, the sharp teeth are waiting for the satisfaction of its fresh and blood. Even, that will be the last meal. You can't see the deadly poison in the daylight likewise the danger behind the bait at night. That is Lethal Enticement.
Use Strong light above the painting allows the pigments to absorb light for about 5 minutes, then turn off the light and see the dark sense.