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Old 09-23-2020, 06:35 PM   #1
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Blue dot on zebra danio's mouth?

Hey guys, there's a blue dot on the lower lip of one of my dad's zebra danio's... What should we do? Picture is attached below:
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Old 09-23-2020, 11:20 PM   #2
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Here's a better picture
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Old 09-24-2020, 11:09 PM   #3
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Maybe a minor outbreak of Lymphocystis, more or less a fish cold sore. If the growth begins to turn white & spread around the mouth, then likely the problem is bacterial in nature.
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