Amphiblestrum auritum is an encrusting bryozoan, most commonly found on the northern shores of the British Isles. The colonies form small rounded patches on stones, shells and algal holdfasts. The species is typically found on the lower shore, extending down to shallow subtidal waters, but it has also been recorded offshore at 70 m  in the western Black Sea (Skolka, 1983) and at 229 m in Northern Alaska (Osburn, 1950), although the latter record may be questionable.

Amphiblestrum auritum has mainly been recorded from cool temperate and boreal waters. It has been reported from Greenland through to the Azores. It is present in the southern North Sea and extends into the south-eastern Baltic. It occurs only rarely in the Mediterranean. In Britain, it is most common on northern shores, but has also been collected from Jersey.

Baai van Heist, Belgian Coast, European waters (ERMS scope), Irish Exclusive economic Zone, Northumberland, United Kingdom Exclusive Economic Zone, Zeeland

Depth range based on 42 specimens in 1 taxon.
Water temperature and chemistry ranges based on 20 samples.

Environmental ranges
  Depth range (m): 5.255 - 214
  Temperature range (°C): 5.960 - 12.863
  Nitrate (umol/L): 2.761 - 17.036
  Salinity (PPS): 32.397 - 35.192
  Oxygen (ml/l): 4.910 - 6.835
  Phosphate (umol/l): 0.382 - 1.316
  Silicate (umol/l): 2.314 - 17.288

Graphical representation

Depth range (m): 5.255 - 214

Temperature range (°C): 5.960 - 12.863

Nitrate (umol/L): 2.761 - 17.036

Salinity (PPS): 32.397 - 35.192

Oxygen (ml/l): 4.910 - 6.835

Phosphate (umol/l): 0.382 - 1.316

Silicate (umol/l): 2.314 - 17.288
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.