Ligula is thought to be the most important tapeworm that infests Abramis brama and can be a major threat to natural and farmed fish populations .The pleurocercoid stages of Ligula intestinalis were found in the body cavities of 81 among the 120 Abramis brama examined from the Aras Reservoir, from October 2012 to December 2013. Mean prevalence of this parasite was 67.5% Mean intensity of infection of L. intestinalis in Abramis brama was 1.77. The highest infection of Ligula intestinalis in abdominal cavity can be compress or displace the organs. Our findings revealed that the Ligula intestinalis infected is very high in Abramis brama in Aras reservoir.
