What is the difference between these tableware flatware and cutlery? 1) May i know specifically in words what the difference(s) are, if any, between 
a fish knife 
a master butter knife (butter serving knife) and
a fruit knife?

I have googled sufficiently and found plenty of images of the first two but kind of found no clearly differentiating issues betwen the two

2) Also I'd like to know more about the clasical fruit knife

3) While we are at it what is a salad knife and  afruit fork that pair with salad fork and fruit knife respectively?

4) Finally, how does one use fish server knife and fork pair (which i assume looks like a jumbo version of the regular fish knife and fork) to serve fish especially if it is in a sauce?  Any advantage of this serviceware compared to athe conventional service spoona nd fork?
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