Sea worm

Sea worm, also spelt seaworm, may refer to one or several of the following taxa:

Taxonomic name	Type	Description	Size
Annelida	phylum	segmented worms	ranges from microscopic to
Aplacophora	Sub-phylum	molluscs that look like worms	a few millimeters to several centimeters
Chaetognatha	phylum	arrow worms
Cycliophora	phylum	found living attached to the bodies of lobsters	less than ½ mm wide
Entoprocta	phylum	sessile aquatic worms	ranges from
Gastrotricha	phylum	pseudocoelomate worms
Gnathostomulida	phylum	jaw worms
Hemichordata	phylum	deuterostome worms	a few centimeters to 2,5 meters
Kinorhyncha	phylum	pseudocoelomate invertebrates, widespread in mud or sand at all depths	1 mm or less
Loricifera	phylum	sediment-dwelling worms	100 μm to ca. 1 mm
Micrognathozoa	superphylum	discovered living in homothermic springs
Nematoda	phylum	round worms	ranges from microscopic to, and some parasitic ones reaching over
Nematomorpha	phylum	parasitic worms
Nemertea	phylum	invertebrate ribbon worms	most are less than long, one specimen has been estimated at
Phoronida	phylum	horseshoe worms	, the largest are
Platyhelminthea	phylum	flatworms
Priapulida	phylum	penis worms, general shape may recall the shape of a penis
Sipuncula	class	peanut worms, a group of unsegmented marine annelids
Teredinidae	family	shipworms, which are marine bivalve molluscs	several inches to five feet.
Xenoturbellida	subphylum	bilaterian worm-like species	up to