Noun gudgeon has 2 senses
  1. goby, gudgeon - small spiny-finned fish of coastal or brackish waters having a large head and elongated tapering body having the ventral fins modified as a sucker
    --1 is a kind of percoid fish, percoid, percoidean
    --1 is a member of Gobiidae, family Gobiidae
    --1 has particulars: mudskipper, mudspringer
  2. gudgeon, Gobio gobio - small slender European freshwater fish often used as bait by anglers
    --2 is a kind of cyprinid, cyprinid fish
    --2 is a member of Gobio, genus Gobio
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