Jebel Zem-Zem (Spanish: Monte Sem-Sem) is the name given to a mountain located north of M'diq below Fnideq in northern Morocco below the Spanish enclave of Ceuta.

It is 3 kilometres (2 mi) south west of the tourist resort Punta Restinga on the eastern coast.

On its northern lower slopes lies an abandoned and ruined fort called Fortín Negrón.

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