A red worm
A friend e-mailed me this link n Wikipedia.
Eisenia fetida (older spelling: foetida), known under various common names such as redworm, brandling worm, tiger worm and red wiggler worm, red californian earth worm, is a species of earthworm adapted to decaying organic material. These worms thrive in rotting vegetation, compost, and manure; they are epigeal. They are rarely found in soil, instead preferring conditions that are inimical to some other worms. In this trait they resemble the Lumbricus rubellus.
When roughly handled, an eisenia fetida exudes a pungent liquid, thus the specific name foetida meaning foul-smelling. This is presumably an antipredator adaptation.
Seems appropriate – a red wiggler worm.