Do other animals puke when they see something disgusting? Maybe other apes?
Yes. Then they eat it.
Cats puke if you feed them starfish.
No, I mean as a "natural" reaction to seeing something disgusting.
Like what most people feels like doing when they see Two Girls One Cup for the first time. Do other animals have such reactions?
i bet they do if they SMELL something foul
Some mammals will spontaneously regurgitate when under extreme stress, which I guess is similar, but I'm fairly sure the concept of disgust (unless you're talking about an extreme dislike for the taste of something) is unique to humans.