Bioluminescence in Other Sea Creature

Many sea creatures use bioluminescence for hunting or avoiding predators.  The anglerfish, or the scary fish in Finding Nemo that lit up, is an example of a bioluminescent creature.  This fish uses bioluminescence to lure its pray close.  It is then able to attack and consume them.  Some squid change color to avoid predators.  This form of defense is made possible by bioluminescence.  During the day, when the squid lurks in deeper water, it emits blue lights to match the color of the water where it is.  The water has filtered all the other colors except blue; therefore the squid only produces that color. When night comes, the squid migrates up closer to the surface and turns green and blue to match the relatively unfiltered moonlight.  Most sea predators hunt by looking upwards to see shadows.  By counter-illuminating, the squid can match the intensity of light around it in order to erase its shadow.  The squid changes its color by minute differences in the water because predator’s eyes adjust to a certain intensity and they can notice small changes.  The squid knows what color to change by the temperature of the water.  The deeper they are, the colder it is, and the blue they have to be. Both the anglerfish and squid use bioluminescence for survival (1).