If you grew up thinking these cute little bugs were some kind of beetle, you’re not alone. Most of us think that roly polies — also known as pill bugs, potato bugs and wood shrimp — must be a type of insect since they’re always found under rocks and logs with other creepy crawlies.
However, these unique little animals are like fish out of water, in a way. Roly polies are crustaceans that crawled out of the sea onto land millennia ago.
How do we know this? Well for one thing, they still have gills!