I am not sure if there is such a thing as a Sunday Fish. But anyway, now you have a font with that name! My idea of a Sunday Fish is a lazy, goofy and kinda laid back one. One you'd like to play around with, and a friend for life - not that kind of fish that ends up on your plate! :)
Sunday Fish has massive language support and 4 different versions of each lowercase letter, and these automatically cycle as you type! It comes in 4 different layered versions, which works well together - just play around with the layers and your favourite colours!