8 animals that glow in the dark

These animals use their lights to attract mates, prey and to communicate with each other. Check list here:

Fireflies: They are mostly visible on summer nights. They emit a soft and rhythmic glow.

Anglerfish: It is a deep-sea predator with a wide mouth. It is one of the most notorious bioluminescent fishes (AI image)

Glow worms: They are similar to fireflies. Glow worms produce bioluminescent light, often seen in dark.

Squid: It uses bioluminescent backlighting for visual cues in the dark deep sea. (AI image)

Jellyfish: They are common in coastal zones worldwide and emit light mostly for defence against predators.

Lanternfish: They are one of many animals that light up the ocean with glowing bodies. (AI image)

Click Beetle: They do not flash but remain constantly glowing.

Fluorescent frog: The first naturally fluorescent frog was discovered recently in Argentina in 2017.