I just discovered this awesome easter egg in The West Wing...then discovered that someone awesome has created an entire website as an homage to Gail the Goldfish!
Gail first appeared on The West Wing early on in Season 1...Since that episode, Gail has become more than a prop on a set, she’s become the focus of private jokes between the West Wing production team and eagle eyed fans of the show. In most episodes her bowl contains some object that alludes to the plot, and this web page catalogues as many of these as possible.
For the record, I noticed Gail's special decor in Six Meetings Before Lunch, which is about panda bears and the national zoo. Gail gets two in her bowl!
I am now through being a West Wing nerd.