管足
tentacular tubular process of most echinoderms (starfish and sea urchins and holothurians) having a sucker at the end and used for e.g. locomotion and respiration
例えば、移動や呼吸に使う先端に吸盤があるほとんどの棘皮動物（ヒトデ・ウニ・ナマコ類）の触手を持った管状突起