I have always named my fish, at least those with personalities!
So...volitans lionfish named Pinhead
percula clown, Krusty (a lot of those around!)
yellow tang, Sunny Delight
the gobies are just collectively known as the Doobie brothers.
Freshwater tanks,
fire eel named eely Dan
mated pair of angels, Ricky and Lucy
mated pair of rams, Dennis (the menace) and Margaret
black lace angel, Cagney
male betta, Armadeus
male betta, Blueboy
red-tailed shark, Spyro
there are other fish, but they don't have names...