These crazy urchins seem to dominate the exposed regions of the mid-intertidal on Kauai. I wasn't really even sure what I was looking at when I first saw them, which is just about my favorite experience outdoors.
Museum of Veterinary Anatomy FMVZ USP / Wagner Souza e Silva
Wikimedia Commons
Summary[edit] Description: English: Rock boring urchin “Echinometra lucunter”. Technique of alcohol and formalin fixation on display at the Museum of Veterinary Anatomy, FMVZ USP. Date: 7 January 2016, 10:04:02. Source: Museum of Veterinary Anatomy FMVZ USP. Author: Museum of Veterinary Anatomy FMVZ USP / Wagner Souza e Silva.
Summary[edit] Description: Français : Un oursin à fins piquants (Echinostrephus molaris) aux Maldives (atoll de Baa). Date: 19 November 2014, 15:06:06. Source: The uploader on Wikimedia Commons received this from the author/copyright holder. Author: Julien Bidet.
Summary[edit] Description: English: Purple sea urchin Heliocidaris erythrogramma at the east side of Pearson Island, South Australia. Date: 10 January 2014, 03:20:21. Source: Own work. Author: Peter Southwood. Camera location33° 57′ 04.46″ S, 134° 16′ 17.36″ EView all coordinates using: OpenStreetMap - Google Earth-33.951240; 134.271490.
Summary[edit] Description: English: New Zealand sea urchin (or kina in the Māori language), Evechinus chloroticus. Date: 2008. Source: Own work. Author: Zureks.
Summary[edit] Description: English: Heterocentrotus trigonarius (Lamarck, 1816). Cross section of spine. Heterocentrotus trigonarius (YPM IZ 080315). Digital Image: Yale Peabody Museum of Natural History; photo by Daniel J. Drew 2016 Preparations: microslide. Source: https://www.gbif.org/occurrence/1269518901. Author: Creator Daniel J. Drew Gall L (2018). Invertebrate Zoology Division, Yale Peabody Museum. Yale University Peabody Museum. Occurrence dataset https://doi.org/10.15468/0lkr3w accessed via GBIF.org on 2018-12-25. https://www.gbif.org/occurrence/1269518901.