Gastropod
Dog Whelk
Nucella lapillus
How to spot it
A thick, short-spired shell with spiral ridges and an oval mouth drawn out into a little spout. White, grey or banded brown (the colour follows its diet). Drills neat holes through barnacles and mussels.
Usually seen at
0-18 m (median 5 m)
Size
Small (under 10 cm)
Habitat
Rocky crevice
Behaviour
On bottom
Where it's seen
Occurrence records around the UK and north-east Atlantic (OBIS).