Benthogenic sediments, generally composed of a variety of benthic organism remains, contain more than 30%C biogenic carbonate. Biogenic calcareous sediments are extensively found along the southern part and towards the northern part (from Akinci Cape to Yumurtalik) of the Iskenderun Bay. Taxonomy of the recent benthic foraminifera of the nineteen samples taken from the benthogenic sediments were studied and micropaleontologically investigated in the laboratory. A total of 147 foraminiferal species from 43 families and 87 genera were described. Although the presence of the agglutinated foraminifera, such as Spiroplectinella sagittula (d'Orbigny), Bigenerina nodosaria d'Orbigny, Textularia bocki Hoeglund, Textularia truncata Hoeglund, Siphotextularia concava (Karrer), Pseudoclavulina crustata Cushman, Clavulina angularis d'Orbigny, and Reophax sp. belong to 5 families and 7 species, calcareous foraminifera are represented by 38 families and 140 species. Eight benthic fossil assemblages, dominated by carbonate species, were described in this study. Ammonia tepida Cushman, Elphidium crispum (Linné), Peneroplis pertusus (Forskal), Asterigerinata mamilla (Williamson), Adelosina cliarensis (Heron-Allen and Earland) and Amphistegina lobifera Larsen are characteristics of shallow water. However, Globocassidulina subglobosa (Brady) and Bulimina elongata d'Orbigny characterize deep water assemblages. On the basis of the examinations on the samples from the regions affected by dense anthropogenic activity, morphological abnormalities were observed on some foraminiferal species, such as; Adelosina duthiersi, Adelosina intricata, Ammonia tepida, Cibicides advenum, Elphidium crispum, Hauerina diversa, Peneroplis pertusus, Peneroplis planatus, Sigmoilinita edwarsi, Sigmoilopsis schlumbergeri, Siphonaperta agglutinans, Sorites orbiculus, Spiroloculina angulata, Spiroloculina angulosa and Triloculina marioni
