There are some folks who think by catch (a very destructive externality from ocean floor trawling) has an impact on this fishery but unfortunately that's more of a guess. The science certainly shows that the temperature anomaly literally preempts reproduction. So heat waves eviscerated an entire generation, perhaps multiple generations.
So can you affect the temperature of the ocean? Not anymore than you can stop global warming. Even if you did everything to become carbon negative, it's gonna be getting warmer before it gets back to normal temperatures.
But stopping eating seafood would be a good start. Lowering demand for them means that they have a chance of surviving through to a time when climate change could be reigned in, maybe in several decades.