I once fed a peacock on the lawn of Monitcello. It ate from my hand. It felt weird. Sort of painful, sort of cool. Part of me thought, wow, a wild creature is eating from my hand. Another part of me wanted to just grab its head and squeeze the life from it and make popping sounds. The other part was wondering if the bird might freak out on me and kill me if I ran out of food - so I looked around me to take in my last look at the world before my death on the lawn was to take place... which it never did.
As for fish - I've seen a picture on rotten.com of a man with a fish on his peeper.