This project has now finished. Thank-you to all who took part. What makes a starfish blue? (or yellow, or grey or…?) The iconic sea star Linckia laevigata is the ‘poster child’ for tropical reefs in ...

The evolutionary history of colour and vision has been closely intertwined over the last 500 million years, leading to a dazzling diversity of colours and visual systems in marine invertebrates.

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Most starfish have eyes on the tips of their arms. They’re hard to see and even if you spot them, you might not recognise them as eyes. But they can see you (as long as you’re not moving too fast).

Most sea-star species have compound eyes on their arms, but there has been no direct evidence that the eyes enable vision. In field experiments, Anders Garm at the University of Copenhagen and ...

This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more ...