Aww this is so reminding me of a show I watch.. King of the Hill(so awesome btw). I swear, if I had that experience, that new fish would be named Buckley!
:) In the show, Luanne has this boyfriend, Buckley, but he ends up dying in an propane explosion in their version of walmart...throughout the series he keeps reappearing to her in dream visions with little tiny angel wings XD Still causing her trouble even after he was gone!
But that's just me hahaha, I realize this wouldn't be a good name if you hadn't seen the show, it wouldn't be as cute/fun :,) Oh well, I hope you come up with a fun name for him! I like the name Kurt. Nightcrawler is awesome!