If you're looking for the other characters, go here Slugterra
In the Slugterra franchise, there are over 40 different breeds of slug.
Aqua Beeks are blue, turquoise, and white Water element Slugs. Its preferred habitats are sea caverns and coral reefs such as Undertow cavern. Aqua Beeks first appeared in "The World Beneath Our Feet Part 2". At velocity it has a similar appearance to a dolphin, with tentacles like an octopus. Its power type is a water and sonar.
Arachnet are, as its name suggests, spider-like Slugs. These Slugs are empowered with the element of earth and are uncommon. While in its protoform it can spin web lines and create small web nets. Its preferred habitat is Deaddrop Cavern and the Cavern of Time. Its power type is spinning webs and nets. It is the favorite Slug of Danna Por.