Thomas A. Carlson (ed.), "Green Strait" in last modified August 9, 2017, http://syriaca.org/place/2934
   
      
         
            
               Green Strait
               الخليج الاخضر
               A strait thought to be "at the end of India" which was longer than the Red Sea.  It is unclear which actual body of water this might refer to.
               
                  Attestation of name الخليج الاخضر in the 
                        Kitāb al-aʿlāq al-nafīsa of Aḥmad ibn ʿUmar Ibn Rustah.
                  
               
          
               http://syriaca.org/place/2934
               
                  Kitāb al-aʿlāq al-nafīsa
                  Aḥmad ibn ʿUmar Ibn Rustah
                  
                  84