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Strongylocentrotus droebachiensis

Strongylocentrotus droebachiensis
Photo Information
Copyright: Bima Aryasena (yasin) Silver Star Critiquer/Silver Note Writer [C: 31 W: 1 N: 43] (129)
Genre: Animals
Medium: Color
Date Taken: 2007-10-21
Categories: Echinoderms, Ocean
Camera: Nikon D200, Nikkor 18-135mm f/3.5-5.6G
Exposure: f/5.3, 1/5 seconds
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2008-06-24 2:47
Viewed: 8069
Points: 40
[Note Guidelines] Photographer's Note
Strongylocentrotus droebachiensis is commonly known as the green sea urchin because of its characteristic green color. It is commonly found in northern waters all around the world including both the Pacific and Atlantic Oceans to a northerly latitude of 81 degrees and as far south as the Puget Sound (Washington State) and England. The average adult size is around 50 mm (2 in), but it has been recorded at a diameter of 87 mm (3.4 in). The green sea urchin prefers to eat seaweeds but will eat other organisms that float by or even catch small fish. They are eaten by a variety of predators, including sea stars, crabs, large fish, mammals, birds, and humans.

Strongylocentrotus droebachiensis is found on rocky substratum in the intertidal and 1,150 meters (3,800 ft) depth. It uses its strong Aristotle's lantern to burrow into rock, and then can widen its home with the spines. Usually, this sea urchin can leave its hole to find food and then return, but sometimes it creates a hole that gets bigger as it gets deeper, so that the opening is too small for S. droebachiensis to get out. S. droebachiensis has the surprising ability to live in waters that have a lower salinity than any other Echinoidea. This allows it to flourish in the south Puget Sound, which otherwise does not contain enough salinity to provide for Echinoidea.

Scientific classification
Kingdom: Animalia
Phylum: Echinodermata
Class: Echinoidea
Subclass: Euechinoidea
Order: Echinoida
Family: Strongylocentrotidae
Genus: Strongylocentrotus
Species: S. droebachiensis

Binomial name
Strongylocentrotus droebachiensis
(O. F. Müller, 1776)


Taken from Polaria Aquarium, Tromso, Norway. The lights was from the auxiliary lamps, not so clear considering the glass between us.

bahadir, boreocypriensis, marhowie, Miss_Piggy, SueThomson, anel, jusninasirun, eng55, LordPotty, izler, jeanpaul, jaycee has marked this note useful
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ThreadThread Starter Messages Updated
To jaycee: Thanks J!yasin 1 07-28 00:43
To jusninasirun: Terima kasih pak Jusni!yasin 2 07-26 23:56
To jeanpaul: Merci beaucoup JP!yasin 1 07-13 18:34
To arfer: Thanks Rob!yasin 1 07-13 18:31
To izler: Sukran katsiran yaa Fatih!yasin 1 07-06 20:33
To iris: Green become yellowyasin 1 07-06 20:30
To LordPotty: Thanks Steve!yasin 1 07-06 20:25
To goldyrs: Sukriya Goldy!yasin 1 07-02 23:31
To eng55: Sukron Omer!yasin 1 07-02 22:50
To iris: Sukriya Silpa!yasin 1 07-02 22:49
To Janice: Thanks Janice!yasin 3 06-30 02:23
To Mana: Thanks Sumon!yasin 1 06-29 22:50
To Silvio2006: Gracias Silvio!yasin 1 06-29 22:46
To anel: Thanke Anne!yasin 1 06-29 22:44
To lousat: Gracias Luciano!yasin 1 06-26 20:43
To SueThomson: Thanks Sue!yasin 1 06-26 20:42
To Miss_Piggy: Thanks Anna!yasin 1 06-26 20:14
To marhowie: Thanks Howard!yasin 1 06-26 20:12
To boreocypriensis: Sukron Professor!yasin 1 06-26 20:12
To bahadir: Sukron Bahadiryasin 1 06-24 19:59
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Critiques [Translate]

Hello Bima, wonderful shot of this sea urchin with great details. TFS. Regards,

Hi Yasin, Wonderful shot of this sea orchin with nice details and DOF. TFS this beauty my friend!


Hi Bima,
Nice color and spiny details :)
Great notes on this interesting specie of urchin,
Thank You!

Hallo Bima
I find this image very fascinating. It is a topic not very often seen on Trek Nature, and your useful notes made it more interesting. The bright colours are well captured and displayed. I'm not very familiar with underwater animals or survivel. I appreciate your photo.
Thanks for this contribution.
Best Regards

Hi Bima
TFS this colourful sea urchin. Good colour, POV, DOF and notes.

  • Great 
  • lousat Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 6595 W: 89 N: 15659] (65489)
  • [2008-06-26 16:57]
  • [+]

HI Bima,very nice presentation,the colors are beautifulls and the details too,very interesting note,i like a lot your different and "brave" gallery,my best compliments,Luciano

  • Great 
  • Janice Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 3277 W: 148 N: 6163] (18832)
  • [2008-06-26 22:52]
  • [+]

Strongylocentrotus droebachiensis - what a mouthful!! It is a pretty sea egg, so sharp and colourful.

We also have Sea Urchins in NZ and the Maori name is Kina. But our Kina / Sea Eggs (Evechinus chloroticus have) dark grey / black spines - nothing as pretty as your photo.


PS After I wrote this I looked up Kina and this is what I found:
New Zealand has about 70 sea urchin species; most are deep-water dwellers, but 11 are found around coastal reefs.

Kina or the common sea urchin or sea egg (Evechinus chloroticus) is the best-known species – commercially valuable and considered a delicacy by Māori.

  • Great 
  • anel Gold Star Critiquer/Gold Note Writer [C: 3053 W: 3 N: 8715] (40574)
  • [2008-06-27 1:35]
  • [+]

hello Yasin,
Very interesting subject, especially for somebody who doesn't live near to the sea. Good note too. This sea orchin looks very beautiful to me, but just a little remark,don't cut the subject too close, even if they are spines :-)!
Have a nice day

Ciao Bima, splendid strange with fantastic colors, great sharpness and fine details, very well done, have a good week end, ciao Silvio

  • Great 
  • Mana Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 1772 W: 36 N: 5597] (18598)
  • [2008-06-29 9:08]
  • [+]

Hi Bima,
Wonderful shot of this Sea Urchin with such lovely colours and details. It looks so beautiful in form and shape. Great illumination. Excellent POV and composition. Kudos.

Hello Bima. Your post are different and rather uncommon here in TN. I like the new perspective with this fine composition of something I have never seen before. The sharpness and detail is brilliant and the colors are amazing. Very well done and thanks for sharing. Best regards. Jusni

  • Great 
  • eng55 Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 1256 W: 42 N: 1976] (5892)
  • [2008-07-02 0:39]
  • [+]

Hi Bima,
Beautiful capture.I liked colors,contrast and visual impact a lot.
Thanks for posting.

Hey Bima!
Nice to hear from you, my friend!I've never seen a sea-urchin, grey or green or yellow!So this is a new learning for me!
keep posting, friend, need to learn more!
Excellent shot!

A beautiful looking sea urchin Bima.
Reminds me of the colourful ones we had on Niue Island where I lived as a kid.
An interesting species and good addition to TNs archives.

  • Great 
  • iris Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 479 W: 60 N: 970] (3088)
  • [2008-07-04 23:41]
  • [+]

Hi Bima,
A very interesting capture in rich colours and with fine clarity.
I am a little surprised after reading your notes. You mention green colour of the urchin, but it looks red and yellow to me!???Wonder why!

The depiction however is a fine documentation of the under water natural life.The notes are very educative and well reserched.

TFS & Cheers

  • Great 
  • izler Gold Star Critiquer [C: 1387 W: 3 N: 9] (44)
  • [2008-07-06 1:05]
  • [+]

hello Bima
really interesting species for me
i like POV, light, colours and informative note

  • Great 
  • arfer Gold Star Critiquer [C: 2731 W: 0 N: 0] (0)
  • [2008-07-06 21:36]
  • [+]

Hello Bima

Like underwater fireworks ,a lovely capture with very good colours.
The composition is well done.
Sharp details and well focused,


Hi Bima
C'est vraiment un travail parfait,les details de cette plante sont parfaite,et aussi les notes tres riches d'info.
Merci beaucoup et bonne journée...JP

Hi Bima,

This may be the first time I have seen a close-up of a sea urchin. A fascinating picture and excellent notes. Beautiful vivid colors and razor-sharp details. I'd love to see more.


this image very fascinating.

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