None of my fish are named, even the distinctive ones with personalities. Well, I think my girlfriend may have named a few, but I ignore them.
Honestly, I hate naming everything. Before keeping fish, I was into rodents, had pet rats and gerbils, and friends named them for me because I couldn't think of anything I liked. Then the Gerbils had two litters before seperating - and I didn't name a single one of the offspring. I still have two of the surviving sons (along with the father), and they've never had names. Don't ever refer to the father by his name for that matter.
Hell, back when I was young, and used to write short stories, I would finish up an entire story and couldn't think up a single name for any of the characters I liked. I just really, really hate naming things.