Sorry for the long wait;
I find it rather funny that the second minecraft mob with color variations can't be dyed. (Outside of collars)
I wonder if it's anything to do with the real life axolotl industry, which often dyes axolotls to trick people into buying them (rarer colors are more valuable)
Obviously that's not a very healthy practice, and it usually results in them getting sick and dying from organ failure.
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