鳃曳动物门是动物界的一个门，是一小类海洋底栖动物，多分布在靠近两极地区的冷海中，在泥沙中或管居生活。身体虽然有体环，但是不分节。目前仅报导过10多种。

Priapulida (priapulid worms or penis worms, from Gr. πριάπος, priāpos 'Priapus' + Lat. -ul-, diminutive) is a phylum of marine worms. The name of the phylum relates to the Greek god of fertility, because their general shape and their extensible spiny introvert (eversible proboscis) may recall the shape of a penis. They live in the mud (which they eat) and in comparatively shallow waters up to 90 metres (300 ft) deep. Some species show a remarkable tolerance for hydrogen sulfide and anoxia.