Scientific name: Carcinus maenas
Size: Up to 8cm across the shell (usually smaller)
Colour: Brown or dark green
Habitat: All kinds of shorelines, including estuaries, to depths of 60m
- When very small, they can come in a huge variety of colours and patterns.
- They are by far the most common crab found in the rock pools.
- They can be identified by the sharp points on the front of their shell.
- Juveniles (young crabs) may have a wide variety of mottled patterns, and blend in well with the sand.
- If put in a bucket with other creatures they are liable to fight and injure them.
Photo credit: Paul Naylor