Urchin
Sea potato
Echinocardium cordatum
Egg-shaped and covered in short, fine, backward-pointing spines like fur, living buried 10-20cm down in clean sand. Almost never seen alive and in the open; what washes up on beaches is the pale, heart-marked test with its five petal-shaped pore patterns.
Usually seen at
0-45 m (median 14 m)
Size
Small (under 10 cm)
Habitat
Sandy bottom
Behaviour
Burrowing, Hiding
Where it's seen
Occurrence records around the UK & north-east Atlantic (OBIS). The ringed marker is the PEBL filming site.
Reference photos
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