Psammechinus miliaris (P.L.S. Müller, 1771)
Shore sea urchin - Gewone zeeappel
Den Osse - Nieuwe Kerkweg, the Netherlands, 30-3-2011.
Preekhilpolder, the Netherlands, 17-10-2013.
Neeltje Jans - Getijdenpoel, the Netherlands, 15-7-2006. Specimen showing gonads.
Kattendijke, the Netherlands, 17-11-2023. In vitro photo specimen A, diameter including spines 30 mm, 23-11-2023.
Kattendijke, the Netherlands, 17-11-2023. In vitro photo specimen A, 23-11-2023.
Sint-Annaland, the Netherlands, 4-8-2011. Specimen showing bulging anus.
Zoetersbout, the Netherlands, 28-4-2022.
Zoetersbout, the Netherlands, 7-5-2015. Male releasing sperm.
Loch Leven, Scotland, 7-7-2017. Specimens B. Male releasing sperm.
Loch Leven, Scotland, 7-7-2017. Specimens B. Male releasing sperm.
Ballachulish, Scotland, 5-7-2017.
Galjoen zonder poen, the Netherlands, 14-11-2012.
Sint-Annaland, the Netherlands, 8-12-2015.
Den Osse - Nieuwe Kerkweg, the Netherlands, 9-6-2017.
Ballachulish, Scotland, 5-7-2017. Eating from
Laminaria hyperborea (Cuvie - Groot vingerwier).
