Worm cast explained

A worm cast is a structure created by worms, typically on soils such as those on beaches^{[1] [2]} that gives the appearance of multiple worms. They are also used to trace the location of one or more worms.

Notes and References

1. Web site: Beach life . OpenLearn . The Open University . 15 February 2021 . en . 12 October 2006.
2. Web site: North Wirral - Intertidal Habitats . 15 February 2021 . https://web.archive.org/web/20051110071719/http://www.wirral.gov.uk/er/nwcp_intertidal.htm . 10 November 2005 . dead.