This might not work for you, but my class two years back named our class fish (a blue beta) - Elvis Fishley. (Don't ask. They loved the name! Alas, Elvis died a short time ago; he'd gone home to live with one of the students after that school year was over. Her brother is in my class now and reported that Elvis had died.)
Ironically, I suggested Elvis because he, of course, loves Elvis Presley. When I saw the Elvis Fishley post, I knew it was a hit...it even made me laugh right out loud!! My principal said that should Elvis Fishley become one of the dearly departed, we will have to say that "Elvis has left the fishbowl."
THANKS FOR THE GREAT IDEAS!!
I had a beta in my classroom until last week when she went to the great fishbowl beyond the sewer. My class named her Sushi. The next year one of the girls stuck her head in during meat the teacher day and yelled out "How's Tuna!"
They tried to tell me naming a fish Sushi is like naming a cow Hamburger. I thought it was a fun name.
two years ago and the class nominated and voted on the names--in the end we were split evenly between Fred and Fish (not real original but I teach SpEd). Well, my last name starts with H so I named him Fredrick Ichabod Samuel H*** so his "first" name was Fred and his initials were FISH Everyone was happy...