Since these are the northernmost of the Hajar range, they and the peninsula are referred to as Ruʾūs al-Jibāl (Arabic: رُؤُوْس ٱلْجِبَال, romanized: Capes of the Mountains).

[7][8] Fauna include the Ruus al Jibal fan-footed gecko,[9] Arabian tahr and caracal.

These include pallid scops-owl, plain leaf-warbler, hooded, variable, Hume's and red-tailed wheatears, and pale rockfinch.

[10] The islands scattered around the tip of the peninsula are in a separate IBA because of their importance for seabirds, including red-billed tropicbird, Persian shearwater, Socotra cormorant and bridled tern.

Then a new force appeared, the Ya'rubids state, and expelled the Portuguese invasion of the Gulf and occupied the peninsula region.