Sea Defenders' Swim for a Clean Mediterranean
From Openwaterpedia

Udi Erell, Oded Rahav, Doron Amosi, Luc Chetboun, Ben Enosh, Ori Sela, Avishag Turek, Adina Paur, Yair Palti and Erez Amir, part of the Sea Defenders' Swim for a Clean Mediterranean, tandem swimming in the Red Sea
The Sea Defenders' Swim for a Clean Mediterranean was a 4-part sea swimming expedition by Udi Erell, Oded Rahav, Doron Amosi, Luc Chetboun, Ben Enosh, Ori Sela, Avishag Turek, Adina Paur, Yair Palti and Erez Amir. They completed sea swims of 6 km in the Red Sea, 6 km in the Dead Sea, 6 km in the Sea of Galilee and 6 km in the Mediterranean Sea over a 24-hour period in May 2018.
Sea Defenders' Swim for a Clean Mediterranean
Sea Defenders' Swim for a Clean Mediterranean in the Red Sea, Sea of Galilee, Dead Sea and Mediterranean Sea, Israel