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mousefish

[mous-fish]
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noun, plural (especially collectively) mouse·fish, (especially referring to two or more kinds or species) mouse·fish·es.
  1. sargassumfish.
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Origin of mousefish

First recorded in 1875–80; mouse + fish
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018