"Epigenetics refers to a group of processes that have long-term effects on gene expression programs but do not change the DNA sequence, such as DNA methylation, histone modifications, chromatin remodeling, and RNA-based epigenetic regulatory control. Environmental stress can cause phenotypic variation in organisms, leading to rapid adaptation via reversible epigenetic changes. Temperature stress can cause significant epigenetic change on a short time scale. Non-lethal heat shock (NLHS) at temperatures above normal ambient can also improve tolerance to pathogen infections in many organisms, including shrimp. We hypothesized that the induced bacterial tolerance was caused by epigenetic changes. MicroRNAs are short non-coding RNA sequences that regulate the translation and expression of specific target genes. MicroRNAs function as epigenetic modulators as they can regulate the protein levels of target mRNAs without altering the gene sequences. MiRNAs, on the other hand, can be affected by epigenetic changes. The study of the relationship between epigenetic regulation of and by miRNAs will lead to the identification and application of novel biomarkers and therapeutic targets against disease. In this study, we will identify miRNAs that can target epigenetic modifier enzymes involved in epigenetic modulation by bioinformatic analysis and in vitro Dual-luciferase reporter assay. Then we will determine the effect of the selected microRNA on epigenetic change.