WAhuizotl (mythology)
WApkallu
WBakunawa
WBoobrie
WCancer (astrology)
WCetus (mythology)
WCoi Coi-Vilu
WIchthyocentaurs
WLotan
WLyngbakr
WMakara
WGloucester sea serpent
WKraken
WSea monster
WMugwump (folklore)
WOgopogo
WSea goat
WSea monk
WSelkie
WUmi zatō
WUmibōzu