Pollution is the common problem in the biosphere and the pollution in the marine habitat was noticed more in the present scenario. There are two ways for the pollution marine habitats. They are Naturally Occurring Radioactive Material (NORM) and Artificially Radionuclides (TENORM). Methods used to estimate the concentration of radionuclides are passive (can technique) which use CR-39 and active with different ways. The passive and active methods are different in the exposure time for detectors. The study area Ra's Al-Beshais lie in the northern west of the Arabian Gulf. The obtained average value of radon concentration with arithmetic mean value of 400.7±198 Bq m-3 by the passive method. The mass exhalation rate in sediment samples under study with average value 0.1617 Bq.kg-1.h-1. This value was acceptable worldwide and safe to use

This work presents measurements of natural radionuclides (238U, 226Ra, 232Th and 40K) in the sea sediment using gamma spectroscopy. The sediment samples were collected from coastal and deep water using special equipment for this purpose. This work was performed in Khor-Abdulla, northern west of the Arabian Gulf to establish the baseline data level for naturally occurring radionuclides in the study area and will be useful for tracking and assessing any accentual pollution in the marine environment in the region. The average values of 232Th, 238U,226Ra, 40K are 5.6 Bq/kg, 7.2 Bq/kg, 44.4 Bq/kg  and 293.9 Bq/kg respectively. It is found that,the mean radium equivalent Raeq and effective dose rates are  84.5 Bq/kg and 0.046 mSv/y respectively and they are well below the recommended limit of international committees.

Coral reef area in northwest of the Arabian Gulf was investigated for mineralogy and geochemistry to throw lights on such unique Iraqi Marine Environment; six specimens of two main species of coral reefs, Platygyra pini and Octocoral Menella were collected at two sites. While eight samples of the surrounding sediments are chosen from other two sites. The mineralogy is determined by XRD, and reveals that calcite, low magnesium-calcite, and aragonite are the main minerals that comprise the Octocoral Menella in site 1, whilst aragonite and calcite are dominate in the P. pini coral reef at site 4. The non-carbonate fractions indicate that these coral reefs contain quartz, anorthite feldspare , halite, and gypsum; the highest content of aragonite was observed in the P. pini compared to calcite. The abundance of carbonate minerals (92.1%) in the P. pini is in contrast to (73.1%) in the Menella. The main minerals in the sediments of site 2 are represented by chlorite and talc, whereas quartz and phengite are the most prominent minerals that diagnose in sediments of site 3; phengite mineral is a first discovery in the sediments of Arabian Gulf, whilst talc is a first detection in Iraqi marine sediments. The concentration of CaO is the most abundant oxide in all the analyzed specimens of the coral reef followed by SiO2. There are high proportions of calcium oxide in P. pini Chevalier coral (56.65 %) than the Menella (48.81%). There are some special pattern of distribution for major and trace elements in coral reef area based on calcium content. Most of the silica came from quartz, phengite and clay minerals; the highest concentrations of