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Sea urchins,


Sea urchins,
Photo Information
Copyright: Siegfried Potrykus (siggi) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 3097 W: 109 N: 12399] (52850)
Genre: Animals
Medium: Color
Date Taken: 2009-02-21
Categories: Crustacia
Exposure: f/4.5, 1/60 seconds
More Photo Info: [view]
Photo Version: Original Version
Theme(s): Mysterious Order [view contributor(s)]
Date Submitted: 2009-03-03 0:32
Viewed: 4201
Points: 44
[Note Guidelines] Photographer's Note
Sea urchins are small, spiny, globular creatures that compose most of class Echinoidea. They are found in oceans all over the world. Their shell, or "test", is round and spiny, typically from 3 to 10 cm across. Common colors include black and dull shades of green, olive, brown, purple, and red. They move slowly, feeding mostly on algae. Sea otters, wolf eels, and other predators feed on urchins. Sea urchins are harvested and served as a delicacy.

Sea urchins are members of the phylum Echinodermata, which also includes sea stars, sea cucumbers, brittle stars, and crinoids. Like other echinoderms they have fivefold symmetry (called pentamerism) and move by means of hundreds of tiny, transparent, adhesive "tube feet". The pentamerous symmetry is not obvious at a casual glance but is easily seen in the dried shell or test of the urchin.

Together with sea cucumbers (Holothuroidea), they make up the subphylum Echinozoa, which is defined by primarily having a globoid shape without arms or projecting rays. Sea cucumbers and the irregular echinoids have secondarily evolved different shapes. Although many sea cucumbers have branched tentacles surrounding the oral opening, these have originated from modified tube feet and are not homologous to the arms of the crinoids, sea stars (sea star) and brittle stars.

eng55, zulfu, haraprasan, nglen, JORAPAVI, Luis52, red45, bahadir, jaycee, xTauruSx, boreocypriensis, matatur, valy67 has marked this note useful
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Critiques [Translate]

  • Great 
  • eng55 Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 1256 W: 42 N: 1976] (5892)
  • [2009-03-03 0:51]

Hallo Sigfried,
Excellent capture againI liked DOF you managed,lighting,exposure and framing a lot.Very well done!
Thanks for posting.

Hello Siegfried,
Excellent capture. Good sharpness, details, POV and DOF.
Regards,
Smitha.

nice globe, TSF Ori

  • Great 
  • zulfu Gold Star Critiquer [C: 685 W: 0 N: 2] (43)
  • [2009-03-03 8:28]

Wonderful sea urchin shell shot Siegfried.
TFS and G's,
Mehmet

Hi Siegfried,
A nice capture of this beautiful sea urchin. Excellent sharp details and a lovely composition. Thanks a lot for sharing.

  • Great 
  • PeterZ Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 5136 W: 166 N: 13121] (49139)
  • [2009-03-03 8:50]

Hello Siegfried,
Very beautiful photo of this urchin. Splendid contrasting colours against the dark BG. Excellent sharp details. Good POV and composition.
Regards,
Peter

hello Siegfried
beautiful sharpness
great colours
nice composition to the dark background
greeting lou

Ciao Siggi, splendid sea urchins with fantastic details and superb sharpness, very well done, ciao Silvio

  • Great 
  • nglen Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 2883 W: 30 N: 9683] (36145)
  • [2009-03-03 13:09]

Hi Siegfried. This is a fine close up of the Sea Urchine. Which you hve taken with fine detail and bright colours. well done TFS.
Nick..

Hola Siegfried,
Excelente macro con gran nitidez y detalle, buena ilumación destacando el objeto sobre el fondo, saludos
José Ramón

  • Great 
  • fiyo Gold Star Critiquer/Gold Note Writer [C: 1053 W: 5 N: 3475] (15161)
  • [2009-03-03 13:25]

Merhaba Siggi,
harika bir kabuk fotoğrafı; renkler, netlik çok güzel olmuş.Tebrikler.

  • Great 
  • Luis52 Gold Star Critiquer/Gold Note Writer [C: 1175 W: 8 N: 4240] (15809)
  • [2009-03-03 13:30]

Hola Sigfried.
You have a wonderful image of this Sea Urchis which I never seen befor, You see I live in the middle of ths semidesert here in Mexico, and each time I can see this creatures are new to me.
TFS my friend.
Luis52.

  • Great 
  • red45 Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2636 W: 74 N: 9100] (31094)
  • [2009-03-03 13:32]

Czesc Siggi!

Swietny pomysl ta Twoja morska seria. Pokazujesz nam wiele bardzo ciekawych organizmow. Dzisiejszy jezowiec tez wyglada bardzo atrakcyjnie, nawet bez kolcow. Bardzo dobre technicznie zdjecie i fajny obiekt.

hello Siegfried, wonderful close up of this shell of a sea urchin.
TFS and regards,
Bahadır

  • Great 
  • jaycee Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 2454 W: 10 N: 8044] (25460)
  • [2009-03-03 16:08]

Hi Siggi,

Magnificent!!! I love the way you have positioned this allowing a wonderful view of the very fine details and beautiful colors. The framing is wonderful.

Jane

Hello Siegfried, an excellent close-up shot of a sea urchin shel with wonderful details.
TFS and greetings,
Deniz

Ohhh... another beautiful sea shell but this time an echinoderm. You captured this also perfectly from aboral side with superb clarity, sharpness and nice composition.
TFS and cheers,
Bayram

Ciao Siegfried,
a splendid close up of Sea urchin taken with good sharpness and lighting, beautiful contrast of the bright colours against the dark BG, very well composed.
TFS.
Best regards.
Maurizio

  • Great 
  • gannu Gold Star Critiquer/Gold Note Writer [C: 1001 W: 4 N: 3276] (14759)
  • [2009-03-04 7:37]

Siggi, This is a superb shot. Excellent and stunning sharpness. Ganesh

Again, one of my favourite subjects Siegfried, and a good capture, soo nice, soo beautiful...
Mehmet

  • Great 
  • valy67 Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1727 W: 59 N: 3060] (9219)
  • [2009-03-04 23:40]

Hello Siegfried !
Wow, a Sea Urchin, ! The last one I saw was the one I had walked on with bare foot, we needed almost two hours to get all the spikes out ! :-) But I really like your picture of the shell, the details and textures are vey well reproduced and the animal stands out very nicely against the black BG. It's very interesting, I like it. Very well done !
Valérie.

  • Great 
  • foozi Gold Star Critiquer/Gold Note Writer [C: 2791 W: 0 N: 6696] (25839)
  • [2009-04-18 23:37]

Hi Siegfried,
excellent sharpness and superbs clarity.
i like the way it is presented , looks like a special planet.
well presented in different and unique style.

regards,
Foozi

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