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There is a page named "File:Sea urchin upside down.JPG" on Wikipedia
DescriptionSea urchin upside down.JPG Black sea urchin Arbacia lixula Date 24 July 2005 Source Croatia Author Lacen...(800 × 600 (201 KB)) - 10:09, 29 September 2020
DescriptionColobocentrotus atratus upside down.jpg English: A shield sea urchin (Colobocentotus atratus) upside down. Date 2 August 2011 Source https://www...(3,872 × 2,592 (3.19 MB)) - 14:37, 1 April 2024
