The deep ocean is the most active bioluminescent environment on Earth.
In the deep sea, sunlight cannot reach beyond a certain depth, making bioluminescence a primary source of light. Many organisms use it for survival in extreme darkness.
Home to fireflies and glowing mushrooms.
Approximately 80 known species of bioluminescent fungi emit a continuous greenish light through a chemical reaction involving luciferin and luciferase, known as "foxfire" when occurring in decaying wood. These fungi often grow in tropical and temperate forests, with glowing gills, caps, or mycelia.
Microscopic plankton can create glowing shorelines at night.
Coastal bioluminescence is often caused by microscopic plankton that emit light when disturbed, creating glowing waves along shorelines. These plankton are called Dinoflagellates.