respect-the-locals:

🐙 Daily Cephalopod Fact: 🐙

Firefly Squid: The photophores that dot the body of the squid produce two different wavelengths of light (both blue and green bioluminescence) while those around the eye and on the arms only produce blue light. The reactant luciferin and the necessary enzyme luciferase are located in a crystalline structure within rod-like bodies in their photophores. Firefly squid are the only cephalopods to have this structural arrangement which increases the efficiency of its bioluminescence and allows the light to be directed downward in a cone-like projection.