Hello Reader, Last week we were swimming in fairly murky conditions, when a vast eagle ray swept by a couple of metres beneath us. I didn’t see him. Once he was pointed out, though, my eyes adjusted. Where, a moment before, I had seen only cloudy water and waving kelp, I could now see his wings, his whip-like tail and his projecting snout. We followed him for quite a way, swooping and diving above and in his wake. I didn’t have my camera, so I can’t share him with you, but that experience is...