Comment by mapt

Sharks are an ancient division of life, roughly 440 million years old, which has survived far warmer oceans.

There are ~500 living species of shark and likely tens of thousands extinct in their lineage.

We are perpetrating a mass extinction event that incorporates not just temperatures, but ocean acidification and trophic cascade for fisheries. In mass extinctions, enough things about the ecosystem change that specialists often go extinct. Great White Sharks are a specialist species in their extreme size; Most size specialists are in a precarious local maxima that disappears too quickly to adapt if conditions change drastically.