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fin rot

noun
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Definition of fin rot

: a common disease of hatchery fishes in which the fin tissues become eroded and necrotic and which is believed to result from bacterial infection especially in the presence of an inadequate diet

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“Fin rot.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fin%20rot. Accessed 20 Jun. 2021.

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