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They’re cute, colourful and … clever? Scientists just discovered that common clownfish can count! Or at least, they can recognise the number of stripes on other fish. And it helps them pick their friends from foes.

If you showed a movie to Nemo the clownfish, he wouldn’t be very impressed. The problem is, clownfish see colours differently to us humans. But worry not! Scientists from the University of Queensland have a TV for clownfish eyes.