red spot under danios skin

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Harriet

Aquarium Advice Regular
Joined
Jul 31, 2020
Messages
96
Location
Uk
there is a faint pinkish red spot under my danios skin on both sides that none of my others have, also another is swimming slow but is eating normally just like treading water and then as soon as food goes in he’s immediately swimming fast to get it is this okay aswell?
 

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