ヒドロムシ類るいMeanings1nounhydrozoanRefers to the class Hydrozoa, a group of small predatory animals including hydras and Portuguese man o' war. Used in biological contexts.ヒドロムシ類るいは刺し胞ほう動どう物ぶつ門もんに属ぞくする。Hydrozoans belong to the phylum Cnidaria.