6 Bioluminescent Organisms
Jellyfish: More than half of all jellyfish species produce some kind of bioluminescence, largely as a deterrent to predators.
Squid: Many species of squid produce bioluminescence, using it for a variety of purposes.
Anglerfish: Like monstrous aquatic versions of the mythological will o’ the wisp---luminescent figures who led travelers astray at night.
Lanternfish: The lanternfishes are among the most numerous fish in the sea.
Firefly: Who didn’t participate in the innocent childhood ritual of interrupting firefly orgies and stuffing the frightened insect.
Fungi: Over 70 species of fungus are known to bioluminesce.