Highlights

'Bioluminescence is light produced by a chemical reaction within a living organism. Bioluminescence is a type of chemiluminescence, which is simply the term for a chemical reaction where light is produced. (Bioluminescence is chemiluminescence that takes place inside a living organism.)

Bioluminescence is a "cold light." Cold light means less than 20% of the light generates thermal radiation, or heat.

Most bioluminescent organisms are found in the ocean. These bioluminescent marine species include fish, bacteria, and jellies. Some bioluminescent organisms, including fireflies and fungi, are found on land. There are almost no bioluminescent organisms native to freshwater habitats.' - via National Geographic

This incredible natural phenomenon can only be witnessed at night time, and whilst it can occur at any time of the year, appears to be more common during the spring and summer months.

We have personally witnessed bioluminescence at Jervis Bay and on the Hawkesbury River in New South Wales, however sightings have also been reported on the beaches of South Australia and Tasmania.