AP BIOLOGY

Detailed explanation-1: -Many deep-sea creatures are bioluminescent. The light is produced by symbiotic bacteria within light-emitting cells called photophores. It’s produced by a chemical reaction when a substance called a luciferin is oxidized. When the light is released, the luciferin becomes inactive until it is replaced by the animal.

Detailed explanation-2: -Some fish dangle a lighted lure in front of their mouths to attract prey, while some squid shoot out bioluminescent liquid, instead of ink, to confuse their predators. Worms and tiny crustaceans also use bioluminescence to attract mates.

Detailed explanation-3: -All the marine creatures glow as they swim. Lantern fish use bioluminescence to protect themselves from predators. By lighting their bodies, their silhouette is less visible from below. Flashlight fishes have special pouches of glowing bacteria under their eyes.

Detailed explanation-4: -Bioluminescent creatures are found throughout marine habitats, from the ocean surface to the deep seafloor. The light emitted by a bioluminescent organism is produced by energy released from chemical reactions occurring inside (or ejected by) the organism.