The shrimp Melicertus kerathurus (Forskål, 1775) and surface water samples were collected half-monthly for 12 months from the five study sites in Mediterranean Sea of Alexandria, Egypt and Arabian Gulf (Saudi Arabia). The present study aimed to measure: 1- the monthly variations of water temperature (°C) ; transparency (Secchi disc reading in cm); total alkalinity (mg/l) ; total dissolved solids (mg/l) ; salinity (g/l) ; chlorides (mg/l); PH (mg/l) ; total hardness (mg/l) ; total Nitrogen (mg/l) and Tributyl tin (μgg-1) in Mediterranean Sea of Alexandria, Egypt (Anfoushy beach (open sea) &...