New Zealand
mudsnail
It only takes one! New Zealand mudsnails reproduce by cloning, and they can live out of water in a damp environment for up to 50 days, making them easy to spread.
These tiny invaders can achieve densities of 500,000 per square meter and their massive numbers can impact native ecosystems.
Clean, Drain, and Dry all watercraft and equipment. Remove all mud and dirt and do not let water stay in your gear.