The Giant Sea Slug is a sea-dwelling invertebrate and the animal that Cap'n Turbot and Francois were looking for in "Pups Save the Diving Bell".
Although it was described as being "very rare", Cap'n Turbot and Francois manage to find it in "Pups Save the Diving Bell".
In "Pups Save a Chicken of the Sea", it plays the role of a minor antagonist when it prevents Zuma and Ryder from rescuing, Chickaletta, Cali, and one of the Seagulls from Cap'n Turbot's runaway Diving Bell. However it was just being playful and apparently meant no real harm.
The slug appears to have a playful personality.
The Giant Sea Slug is a large slug with its body being entirely light pink. Two large stalks hold up its enormous, light green eyes. Long eyelashes are located just above its eyes. The slug has a mouth, tongue and what appears to be teeth.