There's a school of about 10-12 big carp in my new favorite fishing spot. One of them is kind of a dusky platinum color, and I'm certain it's a goldfish. The rest were all basically just mud colored. About half of the rest had some amount of gold sprinkled on them, especially on the tail portions. Not just a gold tinge like some carp have, they have clearly defined orange and gold flecks. They were extremely wary of anything hitting the water, and they wouldn't come close to me, so I didn't get a look at the rest of them.
Quite awhile ago, I found a Petsmart fish bag near there. It had a serial number on it, and when I called the store and asked, they told me it's the code for feeder goldfish. I'm guessing somebody's bait got loose.
So my question is this: if I see gold color like that on a carp, is it likely that it's a hybrid or an old goldfish?
Also, has anyone ever seen koi school with carp? That platinum looked more like a koi, by the color, but I'm not sure if that's something that happens.