In natural conditions, as a rule, the life cycle of the worm is several years and this is due to the difficult conditions of their existence. Brief exposure to strong sunlight causes paralysis in some worms, and longer exposure kills them. Earthworms usually are about three or four inches in length, though some species may grow to over a foot long. 1.2K views View 1 Upvoter Named "Dave" by its discoverers, it is 15.75 inches long and weighs as much as a small chocolate bar. Though these crawlers have male and female reproductive organs, they require mating partners. In protected culture conditions (no predators, ideal conditions) individuals of Allolobophora longa have been kept up to 10 1/4 years, Eisenia foetida for 4½ years and Lumbricus terrestris for 6 years.

Gray worms, which spend their entire lives beneath the soil surface, tend to live between 1.25 and 2.6 years on average [source: Muratake]. Maximum under ideal conditions is about twenty. No Comments According to reliable information, life expectancy at home is from five to ten years.
A. Earthworm longevity is species dependent.
Various specialists report that certain species have the potential to live 4-8 years.

A red pigment in earthworms' skin makes it sensitive to ultraviolet rays. There are more than 2,500 species of earthworms throughout the world and, generally, an earthworm can hope to live between 4 and 8 years. There are more than 2,500 species of earthworms throughout the world and, generally, an earthworm can hope to live between 4 and 8 years. Earthworms usually are about three or four inches in length, though some species may grow to over a foot long. Like their aquatic ancestors, earthworms can live for months completely submerged in water, and they will die if they dry out. During these life spans, worms come to develop some preferences for food and habitats and they have a way of showing when they need perpetually moist environments, somewhere in the 50-percent to 90-percent humidity range.


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