Fish mimicking octopus mimicking fish!
The Harlequin Jawfish, Stalix histrio, occurs in Australian waters. It is known from a few locations in northern Queensland. A second species of Stalix, the Yellow Jawfish, S. flavida, occurs in north-western waters of Western Australia. More information on jawfishes.
Hoese, D.F., Bray, D.J., Paxton, J.R. & G.R. Allen. 2006. Fishes. In Beesley, P.L. & A. Wells. (eds) Zoological Catalogue of Australia. Volume 35. ABRS & CSIRO Publishing: Australia. parts 1-3, pages 1-2178.