The firefly squid is found in the Western Pacific Ocean at depths of and is bioluminescent. The mantle, head, arms and tentacles are dotted with tiny, light-producing organs called photophores. However, light is also produced from many other small organs that are scattered around the body. The firefly squid creates light by a chemical reaction. This process involves wrangling together the dynamic duo of bioluminescence, which are two substances called luciferin and luciferase. The way it works is luciferin sits around waiting for luciferase, an enyme that triggers luciferin to make light. https://www.nytimes.com/2016/04/27/science/firefly-squid-toyama-japan.html#:~:text=The%20firefly%20squid%20creates%20light,way%20a%20lightning%20bug%20does.&text=Together%2C%20they%20form%20a%20bright,only%20live%20for%20a%20year.