UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈmʌdˌskɪpə/US:USA pronunciation: respellingUSA pronunciation: respelling(mudskip′ər)

WordReference Random House Unabridged Dictionary of American English © 2020
mud•skip•per  (mudskip′ər),USA pronunciation n. 
  1. Fishany of several gobies of the genera Periophthalmus and Boleophthalmus, of tropical seas from Africa to the East Indies and Japan, noted for the habit of remaining out of water on mud flats for certain periods and jumping about when disturbed. Also called  mudspringer. 
  • mud + skipper2 1855–60

Collins Concise English Dictionary © HarperCollins Publishers::
mudskipper /ˈmʌdˌskɪpə/ n
  1. any of various gobies of the genus Periophthalmus and related genera that occur in tropical coastal regions of Africa and Asia and can move on land by means of their strong pectoral fins
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