Sea worm may refer to one or several of the following taxa:

Taxonomic nameTypeDescriptionSize (length)
Acanthocephalaphylumparasitic wormranges from a few millimeters up to 65 centimetres (26 in)
Annelidaphylumsegmented wormsranges from microscopic to 3 metres (9.8 ft)
AplacophoraSub-phylummolluscs that look like wormsa few millimeters to several centimeters
Chaetognathaphylumarrow worms2 to 120 millimetres (0.079 to 4.724 in)
Cycliophoraphylumfound living attached to the bodies of lobstersless than ½ mm wide
Entoproctaphylumsessile aquatic wormsranges from 0.1 to 7 millimetres (0.0039 to 0.2756 in)
Gastrotrichaphylumpseudocoelomate worms0.06 to 3 millimetres (0.0024 to 0.1181 in)
Gnathostomulidaphylumjaw worms0.5 to 1 millimetre (0.020 to 0.039 in)
Hemichordataphylumdeuterostome wormsa few centimeters to 2,5 meters
Kinorhynchaphylumpseudocoelomate invertebrates, widespread in mud or sand at all depths1 mm or less
Loriciferaphylumsediment-dwelling worms100 µm to ca. 1 mm
Micrognathozoasuperphylumdiscovered living in homothermic springs0.1 millimetres (0.0039 in)
Nematodaphylumround wormsranges from microscopic to 5 centimetres (2.0 in), and some parasitic ones reaching over 1 metre (3.3 ft)
Nematomorphaphylumparasitic worms50 to 100 centimetres (20 to 39 in)
Nemerteaphyluminvertebrate ribbon wormsmost are less than 20 centimetres (7.9 in) long, one specimen has been estimated at 54 metres (177 ft)
Phoronidaphylumhorseshoe worms2 centimetres (0.79 in), the largest are 50 centimetres (20 in)
Platyhelmintheaphylumflatworms
Priapulidaphylumpenis worms, general shape may recall the shape of a penis0.2 to 39 centimetres (0.079 to 15.354 in)
Sipunculaclasspeanut worms, a group of unsegmented marine annelids2 to 720 millimetres (0.079 to 28.346 in)
Teredinidaefamilyshipworms, which are marine bivalve molluscsseveral inches to five feet.
Xenoturbellidasubphylumbilaterian worm-like speciesup to 4 centimetres (1.6 in)

See also

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