الفهرس 
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Abstract
The present study was performed on the halophilic and/or halotolerant bacterial flora that were isolated from normal mangrove regions of Safaga, Red Sea. Samples were taken from water and leaves from Avicennia marina community. The present investigation was conducted along four representative seasons, from winter to autumn. The results which included survey and physiological studies on few selected isolates, suggested the following:
1. Count of halophilic bacteria were low in the mangrove ecosystem as presented by water and plant leaves samples. Counts varied during the different seasons.
2. Among forty bacterial isolates selected for further studies, 52.5% were classified as extreme halotolerant, 35% as moderate halophiles, 10% as halotolerant and only 2.5% of isolates were classified as haloverstile.
3. Preliminary morphological and physiological studies indicated that all isolates were mesophilic and neutrophilic bacteria, the majority were Gram-positive rods belonging to genus Bacillus, few were Gram-positive cocci of the genera streptococcus and Micrococcus.Science and Education. Microbiology