We did it. Fish to love and lose.
I'm not going to lie, I'm proud of their names.
A golden Snitch
A silvery Patronus
A red-headed Weasley
and a pitch-black Dementor.
M chose Patronus first, and it all followed from there. Yesterday L was still calling his black fish "Vision", but he couldn't resist the lure of the Harry Potter themed group names any longer.
Maybe our next pet can have a super-hero inspired name.