Tags / Aspects



This slate-pencil sea urchin would have been about 50 mm across. It had probably just died and been washed ashore - still had most of its short thick primary spines and smaller needle like secondary spines.
The primary photo is of the top side (aboral) and the second is of the underside (oral) with the mouth in the middle. Just visible in pic 4 is a triangular white tooth-like structure in the centre which is part of a complex dental apparatus called the "Aristotle's Lantern".
The shorter spines were a deep red and the thicker ones were paler, some with deep red ridges. It is possible that a few long ones were broken at this stage.
Spotted on the rocky ocean shore -low tide mark on the south coast. (Phillip Island)

Date & Time

  2018-05-06 11:30 AM


  -38.467279 , 145.16659 : 21.939 m

Near Ventnor VIC 3922, Australia


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Cathy Powers, Michael Gooch, and Mark Ridgway starred this.

  1. Cathy Powers  Leuba - if I could triple star this, I would. Great compilation of images and information.

    Reply • 10 May 2018

    • Leuba Ridgway  Thank you Cathy. I was really excited to find this one with spines intact. I absolutely love marine invertebrates.

      Reply • 27 May 2018

  2. David Francis  Goniocidaris tubaria added. Another great marine species for NS. Maybe we should start a marine species group.(Seashore Species?)

    Reply • 11 May 2018

    • Leuba Ridgway  Thank you David. Sorry for the delayed response. We should start a group. i am sure there would be others with some good specimens. I have a few more to post..

      Reply • 27 May 2018

NS Observation No. 5AF2EB73ED2A893F5A002A65
Created 2018-05-09 10:49 PM (over 1 year ago)
Created By Leuba Ridgway
Updated 2018-05-28 04:52 PM (over 1 year ago)
Updated By Leuba Ridgway
Edits 3
Photo Quality
Camera Date-Stamp Yes
Camera Geotag Yes
Permalink 5af2eb73ed2a893f5a002a65
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