うみほたる 海蛍 LinksSentence search for 海蛍Sentence search for うみほたるSentence search for ウミホタルKanji details for 海 and 蛍Edit in JMdict Noun1. sea firefly (Vargula hilgendorfii); seed shrimpUsually written using kana aloneOther formsウミホタル Discussions Log in to talk about this word.