Banana slug

Banana slugs are any species of the pulmonate gastropod genus Ariolimax, (literally, "Arion's slug"), although when used in the context of a species banana slug usually refers to the Pacific banana slug, Ariolimax columbianus. Banana slugs are usually bright yellow (somewhat resembling a banana) although they may also be green, brown, or white. Some slugs have black spots (Ariolimax columbianus) which may be so extensive as to make the animal look almost solid black. The Pacific banana slug is the second-largest species of terrestrial slug in the world, growing up to 25 cm (9.8 in) long (the largest is Limax cinereoniger of Europe, which can reach 30 cm (12 in) in length.) Slugs use two pairs of tentacle to sense their environment. The larger, upper pair, termed "eyestalks," is used to detect light or movement. The second, lower pair is used to detect chemicals. The tentacles can retract and extend themselves to avoid damage. Banana slugs have a single lung which opens... full article at wikipedia