Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Allocentrotus fragilis (aboral) Description Aboral side: The spines are slender.Diameter 57 mm; Ventura Co., California, USA. Author van Noordenburg, Henk JPG file - 277.96 kB - 1 015 x 1 018 pixels added on 2005-02-23280 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha... © 2005 van Noordenburg, Henk Click here to return to the thumbnails overview