i feed my apurensis 11'' (fowleri) catfish by hand it comes upm the front glass and waits for me to give it food.
here are some pics of me handfeeding my old gar and green aro.
One american eel would not only eat from my fingers, if I held an open tub of earthworms up against the glass it would stick it's head out and eat out of the box.
Hand feed my Murray Cod, my Bala shark gobbles everything I drop in the tank but wont eat out of my hand, so I feed the MC out of my hand first so he gets a good feed before the Bala Shark eats everything else that I drop in.
I used to hand feed my Oscars, when they were small I used to stick my hand in the tank and they would all rush in and try and jockey for position in the palm of my hand! Crazy fish!
I hand feed my angelfish sometimes, I can get it to come about halfway out of the water and grab the food from my hand, I don't froce it to preform like this everyday of course lol