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hatchetfish

noun
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Definition of hatchetfish

: any of several small South American characin fishes with enlarged pectoral fins and thin wedge-shaped bodies that are often seen in tropical aquariums

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“Hatchetfish.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hatchetfish. Accessed 20 Sep. 2020.

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