What kind of worm is this, an earthworm or a worm?

The worm in the picture is: earthworm (larva)

Earthworms, commonly known as earthworms and eels, are representative animals of Oligochaeta in annelids. Earthworms are saprophytic living animals, living in humid environment and feeding on decaying organic matter. The living environment is full of microorganisms but seldom gets sick, which is related to the unique antibacterial immune system in earthworm.