They're pesky critters and they're taking over Auckland waterways.
Red-eared slider turtles are on the list of the world's 100 most-invasive species.
The species originally came from southern United Sates. One woman who knows a lot about them is Angie Harvey.
She's an 'aquatic nanny' of sorts, and runs the West Auckland Fish and Turtle Rescue.
Angie talks to Jesse Mulligan about these waterway invaders.