Biological indexes of zooplankton in coastal region of Bahrakan waters- Hendijan harbor were investigated. samples were collected using plankton net (45 cm and mesh size of 100 μm) during July, August, October of 2010 and December, February, April of 2011.Mean of Shannon diversity index was (1.95) over the year and the min of Margalef species richness was (0.98). The highest value of these inde...