True Fluorescence – Underwater photography by Shawn Miller

” Fluorescence is the absorption of electromagnetic radiation (light) at one wavelength and its re-emission at another, longer wavelength ” Dr Charles Mazel. I attached a link to his website at the bottom of the page for more info.

In order to photograph fluorescence you will need a excitation source (blue light), barrier filter and a camera.

Shawn Miller fluorescence setup

Shawn Miller fluorescence setup

Underwater equipment used – Night dive at Kadena north ,Okinawa.

  • Canon 70d * Canon 100macro lens
  • Ikelite underwater housing
  • 2 x Light&Motion Sola Nightsea blue lights
  • 1 Light & Motion Sola 1200 red * 1 Sola 3800
  • Light&Motion barrier filter and mask

Some of my favorite photographs from our night dive with the crew

True fluorescence

True underwater fluorescence © Shawn Miller

True fluorescence

True underwater fluorescence © Shawn Miller

True fluorescence

True underwater fluorescence © Shawn Miller

True fluorescence

True underwater fluorescence © Shawn Miller

True fluorescence

True underwater fluorescence © Shawn Miller

True underwater fluorescence © Shawn Miller

Palythoa heliodiscus under blue light © Shawn Miller

True underwater fluorescence © Shawn Miller

True underwater fluorescence © Shawn Miller

True underwater fluorescence © Shawn Miller

True underwater fluorescence © Shawn Miller

True underwater fluorescence © Shawn Miller

True underwater fluorescence © Shawn Miller

True fluorescence

True underwater fluorescence © Shawn Miller

True fluorescence

True underwater fluorescence © Shawn Miller

True fluorescence

True underwater fluorescence © Shawn Miller

True fluorescence

True underwater fluorescence © Shawn Miller

True underwater fluorescence © Shawn Miller

True underwater fluorescence © Shawn Miller

True underwater fluorescence © Shawn Miller

True underwater fluorescence © Shawn Miller

True underwater fluorescence © Shawn Miller

True underwater fluorescence © Shawn Miller

* Please check out my older posts on Fluoro-diving, Capturing fluorescence and Fluoro fingerprinting 

* Learn more about fluorescence with Dr Charles Mazel  http://www.nightsea.com/

**Light&Motion Dive lights http://www.lightandmotion.com/choose-your-light/sola

Have a great day!

 

 

Nudibranchs – Colorful sea slugs of Okinawa

Nudibranchs are shell-less gastropods. They are some the most bizarre looking underwater animals found in our oceans. They can be challenging to to find due to their small size and confusing patterns. Nudibranchs are slow moving, delicate and lack a protective shell. Some are extremely distasteful and bright colors warn predators that they are toxic. Some even have the ability to ingest stinging cells and use them as a form of protection.

The best way to find sea slugs:    Move slow!  Search around sponges, hydroids, sea squirts, anemones, soft coral, rocks and reef ledges.

Train the eye:  They can be challenging to find, I recommend tagging along with experienced divers that already have an eye for finding them.

Below are some of my favorite images of sea slugs. Photography by Shawn M Miller.

Chromodoris willani

Chromodoris willani © Shawn Miller

Phestilla melanobranchis

Phestilla melanobranchis© Shawn Miller

Phyllidia varicosa

Phyllidia varicosa© Shawn Miller

Roboasta gracillis

Roboasta gracillis© Shawn Miller

Chromodoris aureopurpurea

Chromodoris aureopurpurea© Shawn Miller

 

Aldisa albatrossae

Aldisa albatrossae© Shawn Miller

Tritonospsilla alba

Tritonospsilla alba© Shawn Miller

Phyllidia elegans

Phyllidia elegans© Shawn Miller

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Gymnodoris nigrocolor – parasite© Shawn Miller

Chromodoris kuniei

Chromodoris kuniei© Shawn Miller

Chromodoris annae

Chromodoris annae© Shawn Miller

Chromodoris sp

Chromodoris sp -space odyssey© Shawn Miller

Janolus sp

Janolus sp© Shawn Miller

Noumea angstolutea

Noumea angstolutea© Shawn Miller

Chromodoris coi

Chromodoris coi© Shawn Miller

Phyllidia coelestis

Phyllidia coelestis© Shawn Miller

Flabellina rubrolineata

Flabellina rubrolineata© Shawn Miller

Glossodoris cruenta

Glossodoris cruenta© Shawn Miller

Chromodoris annae -Ryukyu flare

Chromodoris annae -Ryukyu flare© Shawn Miller

Learn more about the beautiful sea slugs of Okinawa.  Check out Dr. Bolland’s Website!

http://rfbolland.com/okislugs/