European lugworm

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European lugworm (Arenicola marina) with coiled cast (bottom right)

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European lugworm

annelid

Also known as: Arenicola maxina

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description

In lugworm
, A. marina) attain lengths of about 23 cm (9 inches). The lugworm of the coasts of North America (A. cristata) ranges in length from 7.5 to 30 cm.
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endocrine system

In endocrine system: Phylum Annelida
In the lugworm, Arenicola, there is evidence for a brain neuropeptide that stimulates oocyte maturation.
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