Keep is short and simple; or one that has a cute nickname. Mine have been Sunshine (Sonny), Maraschino (Chino), both of them ave passed; and now, New Fish/Newf (dull, but I couldn't handle a lovey name after my Chino passed). He hears and knows his name(meal time!!), is a happy, feisty, ever-hungry baby with 6 neon tetras to keep him company and busy! And challenged for food at feeding time. Every so often he joins in on a game of tag with them. I will admit, I do do a neon-count at meal time just to make sure they're still getting along. I can shout "Newf!" across the room and he immediately starts checking for food.
Sooo.... Wingardiumleviosa... short? snappy? Honestly, kids!! But it's okay we're calling him Levi for short.
And this one is constantly at the food hatch when I go near, never knew they were that intelligent!! It's incredible.