Update: More details on Giant Gippsland Earthworms are here.
Update: I made some mistakes here and corrected them in this post.
Earthworms are the natural recycling factory. Charles Darwin said
Earthworms are nature’s ploughshare.
My garden and compost bin are full of earthworms, which I love, but paradoxically I don’t usually like animals or plants that were introduced to an area by people. Earthworms are one such invasive species in Australia. Australia’s indigenous earthworms can be huge. The Giant Gippsland earthworm (Megascolides australis) has an entry in the Guinness World Records at 3m long (although they’re usually 80cm long). 
It is a vulnerable species, close to extinction, because of habitat destruction (its habitat was small to start with) and human disturbance. This picture shows a Giant Gippsland earthworm being handled, but you shouldn’t do this because they are very fragile and bruise easily.
Ockham's Razor 