Hypertext Webster Gateway: "filefish"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Filefish \File"fish`\, n. (Zo["o]l.)
Any plectognath fish of the genera {Monacanthus}, {Alutera},
{balistes}, and allied genera; -- so called on account of the
roughly granulated skin, which is sometimes used in place of
sandpaper.
From WordNet (r) 1.7 (wn)
filefish
n : narrow flattened warm-water fishes with leathery skin and a
long file-like dorsal spine
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