Alex Mustard / 2020VISION / Common sea urchins (Echinus esculentus) beneath a stand of kelp, Shetland Islands, Scotland, UK, North East Atlantic Ocean, April

Wild Wonders of Europe / Lundgren / Edible sea urchin (Echinus esculentus) on Kelp, Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / Edible sea urchin (Echinus esculentus) on Kelp, Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / Common / Edible sea urchins (Echinus esculentus) and starfish on rock with Klas Malmberg diving, house on coast visible above surface, Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / Two Common / Edible sea urchins (Echinus esculentus) on a rock with Klas Malmberg diving, house on the coast visible above surface, Saltstraumen, Bod, Norway, October 2008

Georgette Douwma / Edible / Common sea urchin {Echinus esculentus} on rock in kelp forest, UK.

SCOTLAND: The Big Picture / Edible sea urchins (Echinus esculentus) grazing under a kelp forest, Scotland, UK, October.

SCOTLAND: The Big Picture / Edible sea urchin (Echinus esculentus), Shetland Isles, Scotland, UK, MAy.

Sue Daly / Edible sea urchin (Echinus esculentus), Trondheimsfjord, Norway, July.

Sue Daly / Edible sea urchin (Echinus esculentus), Trondheimsfjord, Norway, July.

Sue Daly / Reef wall with Edible sea urchin (Echinus esculentus) and Dead man's fingers soft coral (Alcyonium digitatum), Isle of Man, July.

Sue Daly / Close-up of a Common sea urchin (Echinus esculentus) showing spines and tube feet, Sark, British Channel Islands, UK, 2013.