One of the mysteries of the English language finally explained.
Any of various small, spiny marine fishes of the family Agonidae; = "poacher"; especially the armed bullhead, Agonus cataphractus, of coastal waters of northern Europe.
Late 17th century; earliest use found in Francis Willughby (1635–1672), naturalist. Origin unknown. Perhaps compare Older Scots poch, potch, Scots poach, potch denoting the same fish.
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