Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2007.899.904AhmedKerfouf YoucefAmar ZitouniBoutiba 62007106The prospecting of about fifty stations of the continental shelf of the gulf of Oran, allowed the study of the nature of the sediments and the macrobenthic communities. Distributed according to bathymetry, the stations closest to the coast are with -30 m and most distant with -110 m. The use of multivariate statistical analyses the such TWINSPAN (two way indicator spices of analysis) and of indices of diversity, as well as the results of the grain size analysis, led to the identification of principium sedimentary facies, to establish the faunistic inventory of the macrobenthic species and to specify the biodiversity of the various sea-bottom of the gulf. Five communities were identified and characterized. The communities of the gravel sands, the communities on more or less muddy gravel sand, the communities of the muddy gravel sands, the communities of the gravel sands and the communities of fine sands.]]>Amar, Y., A. Kerfouf and A. Bakalem,19981998Bakalem, A.,20012001Baldo, F., S.F. Garcia-Martin, P. Drake and A.M. Arias,199915489493Caulet, J.,1972251289Glemarec, M. and J. Grall,20001253748Hill, M.O.,1979Hilly, C.,198511263276Leclaire, L.,1972pp: 372-373pp: 372-373Llabador, F.,1941pp: 45-54pp: 45-54Millot, C.,1987XCVII498515Millot, J.C., L.T. Letage and M. Benzohra,1989271717Muxika, I. and A. Borja,200551931Pallary, F.,190034860Rebzani-zahaf, C., C. Benzaid, T. Milla and S. Ourad,19981998Shannon, C.E. and W. Weaver,1963Pages: 117Pages: 117Stora, G., A. Arnoux and M. Galas,1995300/301123132Vaissiere, R. and G. Fredj,1963608383Vincx, M.,19871987Pielou, E.C.,196613131144