A flattened round shape approx. 40mm at it's widest. Darkish green with purple spikes
No interactions present.
...to edit and move to invertebrates :)
I thought sea urchin was invertebrates but other ispots had put them in other organisms. Not sure why when I put in the latin name in get recommended the brittle, star fish title came up.
Lat/Lng: 56.8, -6.0
OS grid ref: NM6184