Sampling area of Battillaria attramentaria Hajeon ri, Gochang gun, Siwon myeon, Cheollabuk do, Republic of Korea 35°21’41”N 126°26’21”E Folder and file information: "Footage videos" compressed file contains 60 sub-folders named by day recorded and exposure salinity. For example, videos in Day 1 (16.09.07)_13PSU folder were generated in Day 1 (date recorded September 7th, 2016) by recording snails exposed to 13 PSU saline water. This compressed file was generated using Winzip version 23. The other 12 compressed files are assembly BAM files of RNAseq data obtained from 12 individuals acclimated to different salinity conditions (13, 23, 33, and 43 PSU) with 3 replicate per salinity condition. All compressed files were generated using Winzip version 23.