Sea worm may refer to one or several of the following taxa:
| Taxonomic name | Type | Description | Size (length) |
| Acanthocephala | phylum | parasitic worm | ranges from a few millimeters up to 65 centimetres (26 in) |
| Annelida | phylum | segmented worms | ranges from microscopic to 3 metres (9.8 ft) |
| Aplacophora | Sub-phylum | molluscs that look like worms | a few millimeters to several centimeters |
| Chaetognatha | phylum | arrow worms | 2 to 120 millimetres (0.079 to 4.724 in) |
| Cycliophora | phylum | found living attached to the bodies of lobsters | less than ½ mm wide |
| Entoprocta | phylum | sessile aquatic worms | ranges from 0.1 to 7 millimetres (0.0039 to 0.2756 in) |
| Gastrotricha | phylum | pseudocoelomate worms | 0.06 to 3 millimetres (0.0024 to 0.1181 in) |
| Gnathostomulida | phylum | jaw worms | 0.5 to 1 millimetre (0.020 to 0.039 in) |
| 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 | 0.1 millimetres (0.0039 in) |
| Nematoda | phylum | round worms | ranges from microscopic to 5 centimetres (2.0 in), and some parasitic ones reaching over 1 metre (3.3 ft) |
| Nematomorpha | phylum | parasitic worms | 50 to 100 centimetres (20 to 39 in) |
| Nemertea | phylum | invertebrate ribbon worms | most are less than 20 centimetres (7.9 in) long, one specimen has been estimated at 54 metres (177 ft) |
| Phoronida | phylum | horseshoe worms | 2 centimetres (0.79 in), the largest are 50 centimetres (20 in) |
| Platyhelminthea | phylum | flatworms | |
| Priapulida | phylum | penis worms, general shape may recall the shape of a penis | 0.2 to 39 centimetres (0.079 to 15.354 in) |
| Sipuncula | class | peanut worms, a group of unsegmented marine annelids | 2 to 720 millimetres (0.079 to 28.346 in) |
| Teredinidae | family | shipworms, which are marine bivalve molluscs | several inches to five feet. |
| Xenoturbellida | subphylum | bilaterian worm-like species | up to 4 centimetres (1.6 in) |
See also
editThis page is an index of articles on animal species (or higher taxonomic groups) with the same common name (vernacular name). If an internal link led you here, you may wish to edit the linking article so that it links directly to the intended article.