Diving is a sport that captivates you due to the beauty of the deep sea. Diving in the company of a loggerhead turtle, a dolphin or a shark, in addition to observing multicolored fish, coral reefs, and other species, are just some of the wonders that this practice offers you.
Many organisms remain asleep and hidden during the day, but at night it is possible to appreciate a different scene; In addition, practicing fluorescence or flurodive diving is unmatched.
What is fluorescence?
Fluorescence should not the same as bioluminescence, in which light is produced by living organisms. Nor should it be confused with phosphorescence, the brilliance of which comes from the energy absorbed and stored and then sent back, after a certain period of time has passed, like the face of some watches.
It is the ability to absorb light at a certain wavelength, in a range of 450nm to 480nm (close to UV light and in the spectrum of blue light), and then re-emit it over a longer length.
The number of organisms that emit fluorescence is vast. Research like that of molecular biologist Jörg Wiedenmann of the University of Southampton suggests that corals of different depths can change the colors they emit because they use fluorescent proteins for different purposes either as a sunscreen in surface waters, which gives them a green coloration or for photosynthesis in deeper areas, where sunlight is scarce, emitting reddish, yellow, and orange colors.
Three great attractions that night diving has
- The colors revealed are similar to James Cameron’s Avatar, as well as the blacklight disco parties of the 1970s.
- Night diving is like being in space as you enter total darkness with only a small light source.
- In addition to organisms that emit fluorescence, during the night, it is possible to admire various species that go out to hunt; such is the case of the dying, eel fish, known as moray eels, or the Caribbean reef octopus.
What is needed?
- Blue light lamp (not UV, not blacklight) from 450 to 480 nm, like the Sola NightSea Blue, with Bigblue filters (for rent in various diving centers).
- Yellow filter for diving mask and camera.
- Good buoyancy to avoid damaging corals and maintain safety when diving.
- Long wetsuit, not mandatory (can also be rented).