"It started because you were napping and I was bored. I decided to wake you (very nicely of course) by shaking you and yelling (in my best impersonation of Darla from Finding Nemo), “Why are you sleeping Fishy?!” Ever since then you’ve been Fishy (or some derivative of it). And because you steal all of my words, you have taken to calling me your Fishy too.
This multipurpose “pet” name seems to have stuck for both of us. I even had “My Fishy 9-30-06” engraved on the inside of your wedding band."