Arenicolidae

Arenicolidae is a family of marine polychaete worms. They are commonly known as lugworms and the little coils of sand they produce are commonly seen on the beach. Arenicolids are found worldwide, mostly living in burrows in sandy substrates. Most are deposit feeders but some graze on algae. The arenicolids are characterised by an elongated cylindr...
Found on http://en.wikipedia.org/wiki/Arenicolidae
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