Worm cast

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.

This article is about a structure created by worms. For information about worm castings (excretion) used in gardening, see vermicomposting.
Lugworm cast, Red Wharf Bay, Isle of Anglesey

References
  1. BBC Beach Life
  2. North Wirral - Intertidal Habitats
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