Thalassicus
Bytes and Nibblers
That is way too high, I'd take some of those out.
If you boost the base coast gold yield, I'd reduce the fish yield to compensate.
And I don't see why they should get science?
Keep in mind "coast" tiles have a max yield of 222, with the lighthouse and lab. The fish itself adds +322 (with a fishing boat, smokehouse, and seaport). The numbers are all detailed in the TI/CD readmes. The resources are generally understood to be part of the discussion because they're so common almost any coastal city can get one. There's been many comments over the weeks that coastal cities are still underwhelming, even when built next to resources. That's sorta been the point of doing all these coastal experiments lately.
There was a long discussion about coastal cities... I'll try and find it, though it was back in October I think, and I don't remember if it was in this thread or the combined one...
Edit: Ahh here it is... goes on for a page or few.
In particular though, equalizing early yields between land/water isn't a terribly thrilling idea because it would make island cities more powerful than land, since none of those tiles would actually need to have a worker improve them... can just buy a lighthouse+harbor in a brand new city and poof! Everything fully developed.
This is one reason why I put the final bonus on a very high-tier building, the research lab.
There's also the issue of city placement boredom I described earlier, and water's just about the most monotonous terrain we can get. Putting good bonuses on the resources keeps things interesting.