Here is a yield 7 on turn 52. There are 2 more city sites with multiple seafood that I have found so far. If I go Exploration, I will be able to cherry pick the world's best fish islands.
Because I researched Optics, I am into Classical and Patronage and Aesthetics are open if you are into that. These are all characteristics of a God of the Sea opening.
And then here is a Spain on t42 with high yield tiles in place. So, I'm not sure the argument that Salt gives more yield early can really shift the balance. Spain is on track for a comp bow rush and the CS happen to be military. I am in the classical era, I can open Patronage and I have a decent GPT income. gg