Stink Bomb Slug

Also known as the stink slug, a cannon backed slug, or a skunk slug, a stink bomb slug is a species of slug native to Australia, but was introduced accidentally to United States by humans. They mainly feed on decaying vegetation, as well as fruits, vegetables, and mushrooms (even poisonous ones due to their strong immune systems). They are similar to other slugs, but has a cannon-shaped appendage on its back, which can squirt out burning foul-smelling acid if threatened, hence their name, which can irritate a human's eyes, nose, and mouth. In the U.S., the stink bomb slug is considered as among the 100 worst invasive species.