o.o When I think Cockatoo I think the bird not a squid ._.
This transparent cranchiid, or cockatoo squid (Leachia sp.), retains ammonia solutions inside its body—giving it a balloon-like shape and helping it float. It has large eyes and pigment-filled cells (chromatophores) that look like polka dots and serve as camouflage—all adaptations to life in the deep ocean.
(via: Smithsonian Ocean Portal)
(image: Marsh Youngbluth/MAR-ECO, Census of Marine Life)