Ok, so you recently added fishtanks and fish, so...i was thinking that maybe you can add like a sea-world to Gold Saucer? with all the types of fish swimming around there.
Maybe throw in some Megaldodons, and such? awesome!
Also the lakes and oceans, in-game are rather....empty, so why not throw out some fish there too? i know there's some, here and there, like at a pier in West Thanalan...why not expand on that? would be cool if you had fish that can currently be captured, swim around in the fishing spot.