The descriptive text, below the map, is from the Cornish Red Data Book (2009). The map on this web page depicts the organisms distribution and shows the records made pre-2000 and those made since.
Habitat & Distribution
A boreal subtidal benthic species normally found in relatively shallow water (20-40m) on coarse gravel-shell often with much seaweed and very occasionally found on the shore near the extreme low-water mark. This species has a localised distribution around the British Isles, and never appears to be common anywhere in its range. It has been caught quite regularly and is common in prawn/shrimp trawls in the Falmouth estuary.
I.J. Bennallick, S. Board, C.N. French, P.A. Gainey, C. Neil, R. Parslow, A. Spalding and P.E. Tompsett. eds. 2009. Red Data Book for Cornwall and the Isles of Scilly. 2nd Edition.Croceago Press.
The Cornish Red Data Book Project was led by the Cornwall and Isles of Scilly Federation for Biological Recorders (CISFBR). The full text and species accounts (minus the maps) are available on the CISFBR website.