After the day’s work is over, you often want to eat something delicious tonight and drink beer to relieve the fatigue of the day’s work.On the other hand, people who are busy in the morning don’t have time to eat meals.
一日の仕事が終わったあと今夜は美味しい物を食べ、ビールで１日の仕事の疲れを取りたいと思うことがよくありますね。反対に朝忙しい人は食事を食べる時間がありません。
In the animal kingdom, there are unusual sea creatures that do not have a mouth, digestive tract, or anus. Tubeworms are animals that can live without eating. This creature has a strong vitality, but it is a creature that does not know the joy of eating. In japan,Tube worms are also called Haori bugs because they have a feather-shaped organ near the tip of their long, thin tubes.
動物界には口・消化管・肛門などの消化管等を持たない変わった海の生き物がいます。チューブワームは食事をしないで生きることができる動物です。この生き物は生命力は強いですが、食べる喜びを知らない生物ですね。チューブワームは細長い管の先端近くに羽織(ハオリ)のような形の器官を持っていることからハオリムシむし(羽織虫)ともよばれます。
In the deep sea, there are hydrothermal vents that spout hot water that has been warmed close to the ground. Many creatures live there in search of the various substances contained in the water that gushes out. Tube worms are one of them, and they live in deep-sea hydrothermal vents. In Japan,There are methane springs off Hatsushima in Sagami Bay and springs in Kagoshima Bay.
深海では地中近くで温められた熱水が噴き出している熱水噴出孔があります。そこには湧き出る水に含まれる様々な物質を求めて多くの生物が住み着いています。チューブワームもその一つで深海の熱水噴出口で生息しています。日本では相模湾の初島沖メタン湧水域、鹿児島湾の勇水域があります。
Tubeworms harbor bacteria in tissue cells called trophozoites. This bacterium can produce nutrients from hydrogen sulfide. Tubeworms have a symbiotic relationship in which they supply hydrogen sulfide to bacteria in their bodies, while sulfur-oxidizing bacteria supply organic matter to tubeworms. Tubeworms rely on this bacteria to live, so they do not need a digestive tract such as a mouth, digestive tract, or anus.
チューブワームは栄養体と呼ばれる組織の細胞中で細菌を飼っています。この細菌は硫化水素から栄養を作り出すことができます。チューブワームは体内の細菌に硫化水素を供給し、一方硫黄酸化細菌はチューブワームに有機物を供給する共生関係にあります。チューブワームはこの細菌に依存して生きているので口・消化管・肛門などの消化管を必要としません。
when I was in college, tubeworms were once proposed to belong to the phylum Salvata, but now it is known that they have a trochophore larval stage, that they have a digestive tract until just after landing, and that the rear end of their body resembles that of a lugworm. It has been pointed out that they are closely related to the phylum Annelida, especially the polychaetes (lugworms), as they have similar bristles.
私が大学の頃チューブワームは有鬚動物門と提唱されたこともありましたが、今ではトロコフォア幼生期を持つこと、着底直後まで消化管を持つこと、体の後端部にゴカイのものとよく似た剛毛を持つことなどから環形動物門、特に多毛類（ゴカイ）との近縁性が指摘されています。
