Anisochaeta gigantea

Anisochaeta gigantea (formerly Spenceriella gigantea or Celeriella gigantea),  commonly called the North Auckland worm, is a rare giant annelid of the family Megascolecidae, endemic to New Zealand.

The North Auckland worm is New Zealand's largest, reaching 1.4 m long, and 11 mm in diameter. Its burrows are up to 20 mm in diameter, and reach a depth of 3.5 m.

The type locality is on Little Barrier Island on a plateau 200 m above sea level in forest subsoil. Under both the New Zealand Threat Classification System and IUCN Redlist it is classed a "Data Deficient".