Why is it a problem?
In some areas where it has been introduced, the European shore crab can reach densities of up to 200 per square metre. It consumes a wide range of species, including other crabs and shellfish. Because of this it can have large impacts on the native flora and fauna in estuarine and marine ecosystems. It has also had economic impacts on some shellfish industries.
How to identify this species:
- Medium-sized crab with a body width (carapace) of up to 9 cm
- Adult upper carapace is mottled dark brown to green with small yellow patches
- Underside varies from green to orange to red
- Juveniles are typically a light sandy colour
- Five pointed spines on each side of the eyes
- Three rounded lobes located between the eyes
- Related to paddle crabs but lacks swimming paddles on its hind legs
This pest is not known to be in New Zealand. If you see something suspicious, report it to the Ministry for Primary Industries.
For more information on this species visit the Marine Biosecurity Porthole.
From the team at Clean Below? Good to Go – visit marinepests.nz to get everything you need to know about marine pests ID, boats, rules and more.
