SA fishing boats are being urged to monitor local waters following the discovery of an invasive crab.
A male Asian Paddle Crab has been spotted by a commercial fisher in South Australia this week.
The State Government warns the species are toxic and could threaten local seafood industries.
Fishers who see any unusual species, should report them to Fishwatch on 1800 065 522.
Image of Asian Paddle Crab, PIRSA