Nephtyidae

Nephtyidae is a family of polychaete worms.^[1] They are commonly referred to as catworms.^[2]

Nephtyidae
Nephtys hombergii
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Annelida
Clade:	Pleistoannelida
Subclass:	Errantia
Order:	Phyllodocida
Family:	Nephtyidae
Genera
Aglaophamus Dentinephtys Inermonephtys Micronephthys Nephtys Pellucidaria

Characteristics

Nephtyidae are pale, clearly segmented polychaetes with a small pentagonal prostomium with two pairs of small antennae. Their segments are little differentiated and have a rectangular cross-section.^[3]
Nephtyids are active predators, with a strong muscular proboscis, armed with two well developed jaws.^[4]

They can dig relatively fast through sandy sediments. They can also swim with sinuous movements.^[5]

Nepthyidae polychaetes, found off the Palmer Peninsula, Antarctica, 1962.