Folks may find this useful, I also posted it in YBW. The links below are to the Scottish Government's, Natural Scotland aquaculture resource site. Of particular interest to sailors in Scottish waters is the map feature where you can filter what the map shows.
http://aquaculture.scotland.gov.uk/map/map.aspx
http://aquaculture.scotland.gov.uk/default.aspx
Worth consulting as part of a passage plan as not all will be shown on charts or plotters if they are not maintained up to date.
Enjoy!
BlowingOldBoots