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The Devil

The Devil
Photo Information
Copyright: Peter Bergquist (Pedda) Silver Star Critiquer/Gold Note Writer [C: 41 W: 1 N: 247] (1287)
Genre: Animals
Medium: Color
Date Taken: 2005-07-27
Categories: Molluscs
Camera: Nikon D70, Sigma 105mm f/2.8 EX DG Macro
Exposure: f/10.0, 1/500 seconds
Details: (Fill) Flash: Yes
Photo Version: Original Version
Theme(s): The Red Sea, Underwater World #2 [view contributor(s)]
Date Submitted: 2006-02-19 3:05
Viewed: 6840
Favorites: 1 [view]
Points: 12
[Note Guidelines] Photographer's Note
This is one of very few pictures I have where you can see the underside of the pyjama slug.

The Pyjama slug (Chromodoris quadricolor) is one of the most common nudibranchs in the Red Sea. It grows up to 4,5 cm long and you’ll often find them feeding on the Fire Sponge (Lantrunculi magnifica) or "walking" around on sand, stone or coral on search for a meal.

Chromodoris quadricolor can be recognized according to following characteristics :

- the centre of the mantle consists in 3 black bands and 2 bluish bands. This blue colour can't always be seen because it depends on the lighting

- the border of the mantle consists in a broad orange band delimited by one outer and one inner thin white line

- the rhinophores and gills are orange

- the foot looks like the mantle and consists in a sequence of black and bluish bands, and it ends with the orange band and the white line

The bright color of this species is another example of aposomatic coloration, warning predators that it secretes noxious chemicals when disturbed. These secretions come from a series of glands located marginally around the edge of the mantle just below the surface of the skin. In the C. quadricolor case, these mantle glands are relatively large and highly digitate. The glands differ from species to species, in their size, branching and whether the glands form a continuous series or are separated in groups along the margin.

The name 'quadricolor' is due to these 4 colours present in this species.

ellis49, Janice, jollyjinx, Athila has marked this note useful
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Critiques [Translate]

A briliant macro! The details, especially on one of the horns, are very sharp. Great DOF and colours too.

Hej Peter,
another great UV-picture, the colours are lovely.
Good POV and details.
Very well done.

  • Great 
  • Janice Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 3277 W: 148 N: 6163] (18832)
  • [2006-02-24 22:14]

Peter, you show off this slug so well. What an amazing creature, and all his details and colours are so sharp. It is an excellent photo, thank you,

Great picture worth beeing printed in the nudibranch bible (nudibranch & sea slugs from Debelius).

I wonder if you tried a longer exposure to get the second rhinophore sharp ?

Beautiful details and composition!

  • Great 
  • Athila Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 335 W: 239 N: 493] (1982)
  • [2006-03-23 17:26]

Beautiful close-up!

Image is sharp and perfectly exposed. Composition is well balanced and color contrast is splendid.

Excellent work and TFS.

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