I just held a bloodworm under the water, and my barb ate it!!! OMG!!! I didn't know tropical fish would do that! I know the goldfish do, but WOW! Tropicals are usually so skittish, they run and hide at the sight of a finger.
I already know my guppies would eat from my hand, they try to eat my actual hand when I stick it in the tank. It's so fun feeling all those little nibbles.
Now to get the betta to take a worm