The western slender bluetongue (Cyclodomorphus celatus) is a species of lizard in the family Scincidae.

The species is endemic to the lower west coast and adjacent areas of Western Australia, including many offshore islands.

[2] The spermatogenic activity of the Western slender bluetongue reaches a peak in October.

Mating and fertilization also peak in October.

Young are born in January after approximately three months of pregnancy.