DPG is a comprehensive underwater photography website and community for underwater photographers. Learn underwater photography techniques for popular digital cameras and specialized professional underwater equipment (wide angle, macro, super macro, lighting and work flow). Read latest news, explore travel destinations for underwater photography. Galleries of professional and amateur underwater photography including wrecks, coral reefs, undersea creatures, fashion and surfing photography.
Dive Photo Guide


Luminescent Pygmy Sharks: Evolutionary Origins?
By Angela Messina, April 27, 2012 @ 09:29 AM (EST)
Source: BBC Nature

By examining the bioluminescence of pygmy sharks, scientists believe they have found a clue as to how certain shark species evolved the ability to glow.

Pygmy sharks, at just 22cm long, are one of the smallest shark species in the world. Scientists found that the presence of the hormone prolactin turns off the pygmy shark’s bioluminescence, while in other glowing shark species this same hormone actually triggers their glow.

After examining this phenomenon, scientist suggested that pygmy sharks developed the ability to glow in shallow waters, while deeper water shark species evolved from there and developed a more advanced glowing ability.

Read more in the BBC article



Fantasea FG7X II
Ikelite Housing for Nikon D500
I-DiveSite Venom 35s
SeaLife DC2000
Be the first to add a comment to this article.
You must be logged in to comment.
Support Our Sponsors
Travel with us

Featured Photographer

Follow Us