Blueberry Slug

A blueberry slug is a species of slug native to most of California, Nevada, Oregon, and Arizona. It is basically a slug that resembles a banana slug, in which it is very closely related to, but is blue rather than yellow (which is how the blueberry slug got its name). It is poisonous to almost all predators that try to eat it, but one predator is apimmune to its poison, the American common dylanus, so it can eat the blueberry slug without any harmful side effects occuring to the dylanuses. It is found in not just in forests, but also in grasslands, swamps, and even in human settlements, where they are considered as pests. They were also accidentally introduced to Florida and England, where they are considered as among the 100 worst invasive species.