CreatureData

Blue worm

Perionyx excavatus Perrier, 1872

Status not recordedworms

The blue worm (Perionyx excavatus) is a species in the family Megascolecidae, order Crassiclitellata.

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Quick facts about the blue worm

Weight
Not recorded
Length
Not recorded
Lifespan
Not recorded
Main food
Not recorded
Habitat
Not recorded
Young per litter or clutch
Not recorded
Conservation status
Not recorded
Countries on record
Not recorded

Where does the blue worm live?

Not recorded

Where has it been introduced?

The Global Register of Introduced and Invasive Species lists the blue worm as introduced in 3 countries.

  1. Denmark
  2. Philippines
  3. United States

Introduced means brought by people and now present; invasive means the country's checklist records an impact. A species can be native to one part of a country and introduced in another. Source: Global Register of Introduced and Invasive Species (CC BY 4.0).

Is the blue worm endangered?

No conservation assessment is recorded for this species in our sources. That is not the same as being safe: it has not been matched to an assessment.

How is the blue worm classified?

  1. kingdomAnimalia
  2. phylumAnnelida
  3. classClitellata
  4. orderCrassiclitellata
  5. familyMegascolecidae
  6. genusPerionyx
  7. SpeciesPerionyx excavatus Perrier, 1872

Synonyms Perionyx fulvus, Perionyx intermedius, Perionyx koboensis, Perionyx parvulus, Perionyx shillongensis, Perionyx turaensis

Other names and names in other languages (7)
  • Indian blueEnglish
  • Indian blue wormEnglish
  • Iridescent blue wormEnglish
  • ハラメノウミミズJapanese
  • 팔딱이지렁이Korean
  • 印度藍蚯蚓Chinese
  • 掘穴環爪蚓Chinese

Catalogue of Life

Relatives of the blue worm

Other species in the same genus Perionyx.

CompareBlue worm vs Perionyx aborensisBlue worm vs Perionyx alatusBlue worm vs Perionyx annandaleiBlue worm vs Perionyx annulatus

Common questions

Answered only where our data holds the answer.

Is the blue worm an invasive species?

The Global Register of Introduced and Invasive Species lists the blue worm as introduced in 3 countries: Denmark, Philippines and United States, but does not flag it as invasive in any of them.

What kind of animal is the blue worm?

The blue worm (Perionyx excavatus) belongs to the family Megascolecidae in the order Crassiclitellata.

Sources and how to cite this page

Data as of 2026-11-13. How this page is put together.

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APA

CreatureData. (2026). Blue worm (Perionyx excavatus). Retrieved from https://creaturedata.com/animals/blue-worm

MLA

“Blue worm (Perionyx excavatus).” CreatureData, 2026, https://creaturedata.com/animals/blue-worm.

BibTeX
@misc{blue_worm_2026,
  title = {Blue worm (Perionyx excavatus)},
  author = {{CreatureData}},
  year = {2026},
  url = {https://creaturedata.com/animals/blue-worm},
  note = {Data as of 2026-11-13}
}