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most healthy betta overall

wild-type betta (obviously)
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o
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o

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halfmoon plakat (the best domestic fin shape for swimming, may have weaker genes as a result of inbreeding)

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red (tend to develop skin lumps / ulcers as they age)

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least healthy betta overall

dragon scale (almost always go blind and can’t swim well because their scales grow over their eyes and into their fins)

healthy domestic fin types

crowntail (lighter fins, inbreeding is uncommon)
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o
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scale colours to avoid

blue (very weak immune system because they can’t really digest carotenoids, an important nutrient in their diet)

most healthy domestic colour

light pink / orange (specifically the scales,
fin colour doesn’t really matter)
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veiltail (strongest genes amongst domestic breeds because they aren’t “fancy” so no there’s inbreeding to get a certain look)

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marbled / koi pattern (this pattern requires cells to be constantly mutating, which turns them into a TUMOUR FACTORY)