Marshall Islands Polychaete Worms (Polychaeta)

This page links to photos of polychaete worms (phylum Annelida) that we have photographed in the Marshall Islands. Measurements were not taken in the field and animals were not collected, so all sizes given are rough eyeball estimates, often based on distant memories. Many of these animals are capable of stretching out considerably.

Click on a thumbnail below to bring up a page with larger photos and information about that species; for variable species, several different thumbnails may load the same page.

Amphinomidae

These typically elongate bristle worms are sometimes called fireworms. Their fine lateral chaetae are sharp and easily penetrate skin. Several of those figured may be variations of a single species and one at least is likely the widespread Eurythoe complanata.


Amphinomidae sp. 1


Amphinomidae sp. 2

Amphinomidae sp. 3

Amphinomidae sp. 4

Amphinomidae sp. 6

Amphinomidae sp. 7

Chloeia fusca

Eurythoe complanata

Notopygos albiseta

Pherecardia striata

Pherecardia cf striata

Pherecardia sp. 1

Aphroditidae


Laetmonice cf moluccana

Bonelliidae

The Echiurans or tongue worms to which these belong were formerly considered a separate phylum. The World Register of Marine Species now lists them as included with the polychaete annelids.



Achaetobonellia sp. 1


Achaetobonellia sp. 2

Echiuran sp. 1

Echiuran sp. 2

Echiuran sp. 3

Echiuran sp. 4

Chaetopteridae


Mesochaetopterus sp. 1


Mesochaetopterus? sp. 2

Dorvilleidae


Iphitime sp. 1

Eunicidae

These were formerly mostly species in the genus Eunice. However, a recent review has split Eunice into several genera and examination of the specimen is now required to separate them.


Eunicidae sp. 1


Eunicidae sp. 2

Eunicidae sp. 3

Eunicidae? sp. 4

Eunicidae? sp. 5

Eunicidae sp. 6

Eunicidae? sp. 7

Eunicidae sp. 8

Eunicidae? sp. 9

Eunicidae sp. 10

Eunicidae sp. 11

Euphrosinidae


Euphrosine sp. 1

Flabelligeridae


Flabelliderma sp. 1

Hesionidae


Hesione genetta


Hesione paulayi

Hesione cf uchidai

Hesione sp. 1

Hesionidae sp. 1

Hesionidae sp. 2

Leocrates? sp. 1

Leocrates? sp. 2

Iphionidae


Iphione ovata

Nereididae


Nereididae sp. 1


Nereididae sp. 2

Pectinariidae


Amphictene sp. 1

Phyllodocidae


Phyllodoce sp. 1


Phyllodocidae sp. 1

Polynoidae


Asterophilia sp. 1


Gastrolepidia clavigera

Gastrolepidia clavigera

Lepidonotus cristatus

Lepidonotus oculatus

Lepidonotus oculatus

Medioantenna variopinta

Paralepidonotus cf ampulliferus

Polynoidae sp. 3

Polynoidae sp. 4

Polynoidae sp. 5

Polynoidae sp. 7

Polynoidae sp. 8

Polynoidae sp. 9

Polynoidae sp. 10

Sabellariidae


Lygdamis sp. 1

Sabellidae


Acromegalomma sp. 1


Acromegalomma sp. 2

Acromegalomma sp. 3

Branchiomma sp.

Sabellidae sp. 1

Sabellidae sp. 2

Sabellidae sp. 3

Sabellidae sp. 4

Sabellidae sp. 5

Serpulidae


Spirobranchus corniculatus


Spirobranchus gardineri

Spirobranchus sp. 1

Spirorbis sp. 1

Serpulidae? sp. 1

Serpulidae spp.

Serpulidae sp. 4

Serpulidae? sp. 5

Sigalionidae


Euthalenessa oculata


Sigalionidae? sp. 2

Spionidae


Spionidae? sp. 1


Spionidae? sp. 2

Syllidae


Amblyosyllis sp. 1


Amblyosyllis sp. 2

Amblyosyllis sp. 3

Odontosyllis cf marombibooral

Odontosyllis sp. 1

Syllidae sp. 1

Syllidae? sp. 2

Syllidae sp. 3

Syllidae sp. 4

Virchowia? sp. 1

Terebellidae

Terebellids, sometimes called spaghetti worms, live in tubes under the sand or rocks and stretch out long sticky tentacles to trap food particles. Like many of the worms, it would require direct examination of specimens to accurately determine IDs. We have tentatively separated them primarily on the basis of tentacle color.


Loimia medusa


Terebellidae sp. 1

Terebellidae sp. 2

Terebellidae sp. 4

Terebellidae? sp. 5

Terebellidae sp. 6

Family uncertain


Swimming worm


Unknown worm?

References used for identification:

Colin & Arneson (1995)
Gosliner et al (1996)
Humann & DeLoach (2010)

Thanks to Leslie Harris for looking at some of these photos, identifying some and offering helpful comments on others. Many IDs, however, are just my own guesses, so any errors are certain to be mine.

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