Slug

Slugs are summons in the Naruto series. Although Katsuya is the only slug to appear in the actual series, many other, smaller slugs can be seen in conception artwork and fanart relating to Tsunade, Sakura, and the Sannin.

Slugs' offensive abilities seem to revolve around acids and shooting acid from their mouthes, similar to the way toads use oils and fire. Slugs have also been shown to be able to divide themselves into many smaller replicas, though this ability may be unique to Katsuya due to her large size and high rank. Slugs may also be able to absorb chakra and even control it to some extent, as shown when Tsunade gave Katsuya her healing chakra to heal the citizens of Konoha when Pain attacked. Katsuya, the only slug with any relavence to the story thus far, is often refered to as the "Slug Queen", implying that their are more, lower-ranking slugs similar to Gamakichi and the snakes summoned by Sasuke and Orochimaru from their sleeves. Another implication of this is that Chiyo once refered to Tsunade as "Slug Girl", meaning that when she met Tsunade, she was mostly likely still young, and as such couldn't summon Katsuya yet.

Slug Abilities

 * Tongue Tooth Sticky Acid
 * Chakra utilizing ability
 * Slug Great Division