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mudpuppy

[muhd-puhp-ee]
noun, plural mud·pup·pies.
  1. any of several often large, aquatic salamanders of the genus Necturus, of eastern North America, having bushy, red gills and well-developed limbs.
  2. any of several North American salamanders of the genus Ambystoma.
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Origin of mudpuppy

An Americanism dating back to 1880–85; mud + puppy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018