The name “Pheretima darnleiensis” gained some attention due to a giant blue form that is included in the concept of the species (and filmed in a BBC doc), but I suspect that it is a different creature endemic to Mt. Kinabalu. www.inaturalist.org/observations...
Kinabalu Giant Earthworm (Pheretima darnleiensis)
Kinabalu Giant Earthworm from Kinabalu Park, Ranau, Sabah, Malaysia on May 13, 2009 at 10:19 AM by Chien Lee
inaturalist.org
These are pretty worms, deep purple-brown with bright iridescence. The largest I saw in Singapore was approaching 30cm, so they’re fair-sized for the megascolecid family, though not truly giant.