Oceans Seven
The Oceans Seven is a marathon swimming challenge consisting of seven open water channel swims. It was devised in 2008 as the swimming equivalent of the Seven Summits mountaineering challenge. It includes the North Channel, the Cook Strait, the Molokaʻi Channel, the English Channel, the Catalina Channel, the Tsugaru Strait and the Strait of Gibraltar. List of successful completions. The LongSwims Database maintains a list of swimmers who have completed the challenge: