I was thinking when eating a salad "can goldfish eat tomatos." I'm to scard to try it.

I was told on this site that yes, they can eat tomato.
Make sure you skin it first....

It is pretty acidic so I haven't tried it yet though.

Yep - skin it and remove the seeds. Just give 'em the fleshy part.

My little guy loves tomatoes! Its definately safe tr try. I cut up the fleshy part into small bits and give him just enough to eat in one "sitting"