Abstract In the course of the survey of mollusk fauna associated with the Karaj River in Alborz province of Iran and the collections made in the period 2015-2016. the fauna of snails was investigated. Specimens were mainly collected and studied using conventional methods such as sampling nets and direct collection by hand from aquatic plants. rotten substrates. https://www.roneverhart.com/ASUS-VivoBook-X515-15-6-FHD-Laptop-Intel-Core-i5-1135G7-2-4-GHz-Intel-Iris-Xe-Graphics-16GB-DDR4-RAM-1TB-SSD-Windows-/