The Chaetognaths (Chaetognatha) also commonly known as Arrow Worms, is a biological phylum of the domain Eukarya and kingdom Animalia.
Annelida
Arthropoda
Brachiopoda
Chaetognatha
Chordata
Cnidaria
Ctenophora
Echinodermata
Platyhelminthes
Gastrotricha
Gnathostomulida
Nematomorpha
Hemichordata
Phoronida
Kinorhyncha
Loricifera
Mollusca
Onychophora
Orthonectida
Nemertea
Rhombozoa
Rotifera
Sipuncula
Porifera
Tardigrada
Acanthocephala