Green Sea Urchin
Observation - Green Sea Urchin - UK and Ireland. Description: A small and distinctive urchin and one of only two in iSpot, the other is in Canada. This is perhaps better known as the green sea urchin but it has a hell of a Sunday name of Strongylocentrotus droebachiensis.
A small and distinctive urchin with plenty of UK records. Generally a greenish hue but with purple undertones and purplish spikes. I was not able to look closely at the pedicellariea which definitively separates this from Strongylocentrotus droebachiensis but I am more certain about the second ID