Baie de la Seine, Banc d'Arguin, Belgian Exclusive Economic Zone, English Channel, Golfe Normanno-Breton, Greek Exclusive Economic Zone, Irish Exclusive economic Zone, Mozambique, North Sea, North West Atlantic, Portuguese Exclusive Economic Zone, Red Sea, Roscoff, Spanish Exclusive Economic Zone, United Kingdom Exclusive Economic Zone, West Coast of England, Wimereux

Distribution: Indian Ocean, India, Red Sea, atlantic Ocean. (Fauvel,1957).

Bay of Fundy; Iceland; North Sea; English Channel; France; Mediterranean

In the 1976-1986 period Glycera alba was only found twice (western coastal zone; maximum 4 ind./m2). In the 1994-2001 period the species was more widely distributed and was mainly found in the western near-coastal zone. Glycera alba was observed only sporadically in the open sea zone. In this period the species reached a maximum density of 100 ind./m2.

Medium-sized (up to 75 mm long) bristle worm whose body narrows towards both ends. The eversible proboscis has papillae and four jaws. The antennae are very small. Segments are subdivided into rings. Small parapodia with clear gills. Colour: milk white.

Glycera alba prefers sediments with a median grain size of 50 to 250 µm but is also found in coarser sediments (up to 500 µm). The species furthermore tends to prefer sediments with a mud content of 10-20%. The high relative occurrence in sediments with a mud content of 40-50% is considered unreliable.

Prefers mud and sand substrate; found in the littoral and sublittoral zone

Depth range based on 335 specimens in 1 taxon.
Water temperature and chemistry ranges based on 232 samples.

Environmental ranges
  Depth range (m): 0 - 434
  Temperature range (°C): 5.803 - 26.992
  Nitrate (umol/L): 0.062 - 12.636
  Salinity (PPS): 31.839 - 38.993
  Oxygen (ml/l): 3.422 - 6.588
  Phosphate (umol/l): 0.094 - 0.888
  Silicate (umol/l): 1.506 - 10.986

Graphical representation

Depth range (m): 0 - 434

Temperature range (°C): 5.803 - 26.992

Nitrate (umol/L): 0.062 - 12.636

Salinity (PPS): 31.839 - 38.993

Oxygen (ml/l): 3.422 - 6.588

Phosphate (umol/l): 0.094 - 0.888

Silicate (umol/l): 1.506 - 10.986
 
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