We collected environmental samples during the second cruise of the project “The Great Southern Coccolithophore Belt” collecting samples in the South Indian Ocean and Southern Ocean during the RSS James Clark Ross Cruise JCR271 as part of the project on Arctic Ocean Acidification collecting samples in the Arctic finally we collected two costal samples off the coast of South Africa during algal bloom events. Samples included 16S, 18S amplicons and metagenomic data.