Zappa poses with Marshmoff on his shoulder on the cover of London Symphony Orchestra, Vol. II.
Zappa had other cats too, a white one called Tweezer, a gray and white one called Bill, a black and white Persian called Fightey Bitey and another black and white called Spot.
Zappa about Marshmoff
"There's the legendary Marshmoff, the black one that sits on your shoulder and drools. [laughter] She is now commuting between our house and somebody else's house, and she occasionally comes over and drools all over the place. And then there's two black and white cats. One's named Spot, which is a male, and that's one of the reasons Marsh Moff isn't here so often, because Spot's been chasin' her out." - Frank Zappa in They're Doing the Interview of the Century, Part 2.