Whereas with a Japanese print, which uses highly light sensitive colourants, that can be displayed for more like eight months per decade, or even less.
Light sensitive cells in our retinas feed signals deep into that brain region, training neurons to sync up with Earth's 24 hour cycle of day and night.
So the researchers placed the brittle stars in an environment with black-and-white-patterned walls, aimed at testing whether the creatures were simply light sensitive—which isn't the same as vision—or if they could truly see.