wet fish
n.— «Both fish reside in the middle-water column of the ocean, causing those in the fishing industry to refer to them as “wet fish.” This means that a lot of water must be pulled into boats when scooping them in from the sea and subsequently expelled when the boats drain their haul.» —“Sardines re-emergence in the Monterey Bay” by Melissa Schilling Santa Cruz Sentinel (California) Mar. 26, 2008. (source: Double-Tongued Dictionary)
Further reading
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