Abstract

• Studies on diversity of turret shells were conducted at Kawdut (Lat. 15° 49′ N, Long. 97° 23' E), Sitaw (Lat. 15° 11' N, Long. 97° 48' E) and Kyungyi Island (Lat. 15° 04' N, Long. 97° 45' E) in Mon coastal areas from June 2016 to May 2017. A total of 135 individuals were collected from three different stations. Duplicate turret, Turritella duplicata and Screw turret, Turritella terebra were dominance. Higher density of turret shells were recorded in station 1 with 0.027 ind/m2 and station 2 was recorded lower density with 0.004 ind/m2 at Kawdut. Univariate analysis at Kawdut subtidal population recorded higher values for diversity and richness indices compared to Sitaw sandy bottom and Kyungyi Island but the value of evenness index was quite similar between the three stations. Fifty eight individuals of turret shell were collected from study areas for taxonomy identification. Seven groups of turret shell were identified base on the external shell characteristics. Seven species were clearly identified which Turritella and Haustator were dominant from the intertidal water of Mon coastal shoreline.