 Along the west side of the Hajar mountains are a number of westward flowing wadis or valleys penetrating far back into the higher hills. Few hold permanent running water, with Wadi Ghayl one such example. Two species of fish are found here, the Arabian killifish (Aphanius dispar), and Garra barreimiae, a member of the carp family with no common name but endemic to the UAE and northern Oman.  The latter is able to negotiate steep damp surfaces, presumably as an aid to survival, allowing it to reach upstream pools during drought. Larger specimens are sometimes caught for human consumption. There are no frogs in the UAE, but sharing pools with these fish may be Arabian toads (Bufo arabicus), often abundantly so.
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