Already has and did.
And continues to. To shocking levels.
Plus the ocean is a whole lot warmer.
And the co2 is dissolved. In there.
So we are seeing tropical fish show up in northern climes. We're seeing aquatic life in places it's not supposed to be. Imagine fishing off the coast of Alaska for Marlin. That's funny.
And will never happen. Because not enough sunlight makes it there.
Tropical fish are bathed in solar energy. As are the plants and animals they require.
Alaska is all about being fat to survive. Oily fish. Whales. Etc...
Alaska with warm water doesnt get the sun it needs.
The number of fish who are evolved to live in an environment like that are zero.
Didn't a new reef just start bleaching?