Sounds like how I got one of mine.
it's so cute
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I never seen a black goldfish before so are you messing with me? if not that is super cool
Google it, its real
just did and got this "The Black Moor is a beautiful and intriguing type of fancy goldfish. They can usually be spotted easily as a result of their distinctive blackcoloring. However, they have other physical traits that you can look for when trying to identify them. These fancy goldfish are born an amber coloration and have flat eyes." so it's a fancy fish that is so cool
I'm a fan of pigs aka oversized dogs well I ones we had acted like dogs besides the head butting