cirriped

marine crustaceans with feathery food-catching appendages; free-swimming as larvae; as adults form a hard shell and live attached to submerged surfaces

羽毛状の捕食付属肢を持つ海産甲殻類；幼生時は自由遊泳し、成体になると硬い殻を形成して水中の付着面に固着して生息する