An aggressive competitor with a dangerous but impressive ‘karate chop’ ability to stun prey. It lives in burrows in the sand and mud, causing damage and making it hard to trap. In large numbers it leaves no space or food for other native crab and shrimp species.

How to identify this species:

• Has red-maroon line running down body

• Outer edges of tail are blue and yellow

• Native species has grey and yellow edges on tail

• Can grow up to 19 cm