A colloquial or archaic term for a fish that is counted among a catch or inventory; any individual fish being tallied.
From count + fish. An older English term combining the common noun count (enumeration) with fish, used in fishing industries and commerce.
This is an adorably practical old word—when fishermen would count their catch at the end of the day, each individual fish was a 'countfish,' which shows how language often names the most mundane, daily tasks.
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