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Submarine mud volcanism represents an important migration pathway for CH4 and other long-lived greenhouse gases as CO2 from deeper reservoirs to the surface. The high levels of methane (150 to 200 nM) in bottom waters imply that there are sites with localized, probably periodic, enhanced methane release in these mud volcanoes Gases concentrations from: Physico – chemical analyses indicate that 9 of the 11 sampling sites above MVs were seeping gases at the time of surveying, predominantly at Algacel, Mercator and Rosco MVs. Our observations suggest that the emission of methane and carbon dioxide from the mud volcanoes structures studied here may be relevant at the present as a part of the carbon global cycle and to the global methane budget of the hydrosphere and possibly also to the atmosphere. MVs of this study are widely located at the Moroccan field, along the middle and upper slop