This document discusses decomposition and insects of forensic importance. It describes the 5 stages of decomposition that occur with cadavers in aquatic environments: 1) submerged fresh, 2) early floating, 3) floating decay, 4) advanced floating decay, and 5) sunken remains. It also outlines some of the major groups of insects associated with cadavers in aquatic and terrestrial habitats, such as flies, beetles, and how they can help estimate the postmortem submersion interval.