The glossy shell of some beetles, it has long been speculated, helps hide the insects from predators. A recent paper put the hypothesis to the test—and found it wanting.
As it matures, this chromatophore-clad pyjama squid (Sepioloidea lineolata) hatchling will learn to use the color-changing cells that adorn its body to alter its appearance.
With brown splotches artfully strewn against its bright yellow coloring, the striking imperial moth (Eacles imperialis) appears more leaf than Lepidoptera.