Tubularia mesembryanthemum

Japanese: ベニクダウミヒドラ（英語表記）Tubularia mesembryanthemum

It is a member of the order Anthoathecata, class Hydrozoa, and family Polyhydra. It has hydroflowers at the end of hydrostalks about 3cm tall, and attaches to seaweed and the like by hydroroots. The hydrostalk is slightly bent, then bends sharply at the top to join the hydroflower. The hydroflower is relatively large, with about 10 short tentacles surrounding the mouth at the end, and about 20 long tentacles arranged in a row at the bottom of the hydroflower. The reproductive organs are branched tufts, each of which bears several asci, and are produced inside the long tentacle ring. It is commonly found in shallow inland bays south of central Honshu, and is also distributed along the coast of Europe. (→Cnidaria, Hydrozoa, Invertebrates)

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

刺胞動物門ヒドロ虫綱アンソアテカータ目クダウミヒドラ科。高さ 3cmほどのヒドロ茎の先端にヒドロ花をつけ，ヒドロ根で海藻などに付着している。ヒドロ茎は多少屈曲し，上端で急に折れ曲がってヒドロ花に続く。ヒドロ花は比較的大きく，先端にある口を取り巻いて短い触手が約 10本，ヒドロ花下部に長い触手が 1列に約 20本並んでいる。生殖体は枝分かれした房状で，その房のそれぞれに数個の子嚢をつけ，長い触手環の内側に生じる。本州中部以南の内湾の浅所に普通に見られ，ヨーロッパ沿岸にも分布している。（→刺胞動物，ヒドロ虫類，無脊椎動物）

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