Crab
Shore Crab
Carcinus maenas
How to spot it
Britain's commonest crab, on every kind of shore. The shell is broadest near the front with five sharp teeth down each side behind the eyes and three little bumps between them. Green to mottled brown; the back legs are pointed, never flattened into paddles.
Usually seen at
0-13 m (median 3 m)
Size
Medium (10-50 cm)
Habitat
Rocky crevice, Sandy bottom
Behaviour
On bottom, Hiding
Where it's seen
Occurrence records around the UK and north-east Atlantic (OBIS).