Yes, but it is that word 'cold' that puts me off! My grandson is a diver and dives quite a lot in his dry suit in lakes in the North of England. I like my sea temperature to be roughly akin to a warm bath!
Good news - David Attenborough will be relieved. Having always dreamed of seeing and snorkeling the Great Barrier Reef, the reality, when I did, was heartbreaking. The marine biologists on the boat I was on were so concerned. I had the same experience in the Red Sea but I think that was more of a tourist induced death of the coral.