Episode list

Water Colours

A Touch of Fluorescence
'Measuring' wavelengths to 'see' colours we can't perceive reveals invisible signals and patterns in polarization and UV. Flashing ultra violet displays indecipherable to predators, marine animals communicate animatedly in cryptic channels visible only to select eyes. For the first time on film, we discover the key role that fluorescence plays in the lives of many species. Using the latest technology to interpret a language beyond our visible range, in the most intimate, exhilarating understanding yet, discover the 'secret' language of fish.
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