A scientific researcher harvests a batch of oysters to measure the consequences of water warming of the Etang de Thau, during a media day organised by French Research Institute for Exploitation of the Sea (Ifremer) near Sete, southern France, on July 2, 2026. The world's oceans just experienced their hottest June on record and could set fresh highs in the months ahead as El Nino and climate change drive temperatures even higher, scientists said on July 1. (Photo by Gabriel BOUYS / AFP via Getty Images)