Cirriformia

Cirriformia is a genus of marine worms belonging to the order Cirratulida within the class Polychaeta. These polychaetes are sedentary, meaning they live in one place, often within tubes they construct. They are characterized by a pointed prostomium (the foremost part of the head) that lacks appendages. Gills, if present, are long and slender and emerge above the parapodia, which are paired, lobelike outgrowths on body segments that bear bristles called setae.12

Cirriformia species vary in size, typically ranging from minute to about 20 cm in length. They are part of the larger phylum Annelida, commonly known as segmented worms, which are notable for their distinct body segmentation.21