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Jay Leno impersonator

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One of my cardinals is growing a chin. Anyone know what this could be?

Sorry, hard to get a clear picture.

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Fat little fella. Maybe it is a double chin. ;)
Not sure how long they live, but I've only had my cardinals for 8 months, and none of them were adult size.
With the girth on that fish it looks old. Cards get "fat" when they are up in age.

That fish looks like it's been an adult for a while.

They live a few years in the wild and several in captivity.
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