Interesting.
The fog was so heavy and the screen so dark I couldn't see more than about a foot ahead of me, so I had to turn up the brightness to even find my way around. After that it was doable.
I managed to get up to 92 on my 3rd or so try. The little fishies liked to corner me at the top of the water, piling under me and pinning me against the side of the ship so I couldn't go anywhere, and then nibble me to death. I also lost far more health to drowning than to fish bites much of the time.
As the swarm got thicker, I once got stuck inside the ring with fish pinning me in on both sides so I couldn't get out, and they wouldn't go in to die. Those jerks. lol!
Clerver idea, and it was fun to try out.
When my computer inevitably explodes and kills me, my cat inherits everything I own. He may be the only one capable of continuing my work.