Megalorchestia corniculata is a species of beach hopper in the family Talitridae.
Megalorchestia corniculata, a talitrid amphipod, is a crucial consumer of wrack (seaweed). By Consuming wrack, Megalorchestia corniculata helps process it and contributes to nutrient cycling in sand beach ecosystems. Megalorchestia corniculata plays a vital role in breaking down organic matter like kelp, which promotes nutrient availability in intertidal environments. Consuming it and excreating ammonium enhances the nutrient cycling in sandy beaches.[1]