i was just wondering what some of the problems with shipping tropical fish are?

Mostly extreme temperature changes and slow shipping. Both are overcome by doing overnight shipping. Costly as hell though.

It cost me $15.00 to have my Endlers shipped from FL to MN, 2 day shipping. I only had 1 fatality out of 13 fish.

You can run into problems if the fish are not packaged properly, or if they get "sidetracked" by the post office, and some species are more difficult to ship than others.

Is this another school thing?