Topzle Updated: Wikipedia source
Banana slugs (Ariolimax) are a genus of air-breathing, terrestrial gastropod slugs in the family Ariolimacidae. They are often yellow in color and their elongated shape can resemble a banana, thus giving rise to their common name.
| Image | Scientific name | Common name | Distribution | Description |
| | Ariolimax buttoni (Pilsbry & Vanatta, 1896) | Button's banana slug | California | Single spot on the mantle |
| | Ariolimax californicus (J. G. Cooper, 1872) | California banana slug | California, Oregon | Light yellow, Length 175–200mm |
| | Ariolimax columbianus (Gould, 1851) | Pacific banana slug | United States (Alaska, California, Idaho, Oregon, Washington), Canada (British Columbia) | Olive green with black spots and blotches, Length 185–260mm |
| | Ariolimax dolichophallus (Mead, 1943) | Slender banana slug | Coastal Central California | Light yellow, Length 150–180mm |
| | Ariolimax stramineus (Hemphill, 1891) | Southern Pacific banana slug |