I never name my individual fish when I keep multiples of the same species in a tank.... can't tell 'em apart. Lol. I do name my betta, that's about it. I do call my 3 cardinals the three amigos! But I can't tell dusty buttoms from ned needlender nor (I forget the other charactors name). This makes no sense if you haven't seen three amigos..... in that case go get the movie!
I call all mine "fishie" except my huge pleco that I've had for a couple years now he has quite a few names including big, biggie, monster, dinosaur, fish, and right now I'm calling him a bad name because he keeps eating all the seaweed stuff I put in there and not sharing it!