Some may not know but airplanes are used in some parts of the US to restock populations of trout into remote areas . The link includes video of one in utah but they also do it in Yosemite CA.
I think it would be a neat mission or challenge to have to fly into the mountains and drop trout into targeted areas and be given a score on accuracy.
And also if the trout are persistent objects in the game. Meaning they dont dissapear after awhile it would be kind of fun in Multi Player to have some sort of community event where everyone dropped fish in the say the same field or something and see how big of a trout pile we could make.
Imagine a pile of fish rising into space.