scy·pho·zo·an /ˌsaɪfəˈzoən/
  scyph·o·zo·an /-ˈzoən/ 形容詞 名詞
  scyphozoan
       n : any of various usually free-swimming marine coelenterates
           having a gelatinous medusoid stage as the dominant phase
           of its life cycle
       [also: scyphozoa (pl)]