What chemical makes the anglerfish glow?

The anglerfish glows due to the presence of bioluminescent bacteria that reside in the light-producing organ called the esca, which is located at the end of its lure. These bacteria produce light through a chemical reaction involving luciferin, a light-emitting compound, and luciferase, an enzyme that catalyzes the reaction. This bioluminescence helps attract prey in the dark depths of the ocean.