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Linnaeus, 1758

Anterior region thick, posterior region long and narrow. All but the anteriormost segments superficially divided into five rings, with a strongly rugose epidermis. Prostomium small, three-lobed, retractile. Anterior region of 19 chaetigers, of which the last 7-19 bear branched dorsal gills; posterior region lacking gills and chaetae.

Up to 200 mm for 19 chaetigers.

Flesh-pink when young, later greenish yellow; stains yellow when handled (A. marina-dark coloured).

Occupy a fairly deep burrow in sand or muddy sand, whose head end is indicated at the surface by a shallow conical depression; the characteristic coiled wormcast appears at the top of the tail-shaft (Arenicola-detail). On the lower shore.

North Sea to Öresund, Arctic to Mediterranean.

Arenicola marina