There should only be around 1 million tonnes of Sargassum in the Equatorial Atlantic, there is now 30 million tonnes and the Sargassum as used up all the trace nutrients, and phosphate that would otherwise be used by phytoplankton. We measure less than 1 phytoplankton and zooplankton in 80 litres of water in the equatorial Atlantic Ocean. Why is this not being flagged up as a catastrophy?