I’d also recommend getting a bigger spear. If you’re feeling really adventurous, I’d advise getting out of the water entirely. Never getting near a large body of water again seems like a good option. Personally, I wouldn’t even bathe.
After I spend a few decades back on land, I might feel safe enough to start showering again. I might even start drinking water instead of having someone blindfold me and it inject it intravenously. By the time I’m in my late 80s, I could probably get within 100 yards or an aquarium without passing out and writhing around on the floor.
I’d have to get over it eventually, but that will take some time. When I’m the ripe old age of 165 I wouldn’t definitely be comfortable enough to look at pictures of the ocean again.