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In 2022 the swim fin was on the other foot—and the importance of the technological treasure sitting on the seabed was gargantuan.

While Ben has his blade, a child from Cumbria has been given a water limb called a "swim fin" which will make swimming with friends possible.

For both my sake and the health of the reef, I don’t want to touch its flora or fauna, especially the coral, which is sharp and easily broken by a kick from an errant swim fin.

He swims with a swim fin on his left stump.