Monocorophium acherusicumMonocorophium acherusicum is a species of amphipod crustacean.DescriptionMonocorophium acherusicum is a small species. It is brown with a very short abdomen, and has three little spines on its enlarged second antennae. It has rows of hair on its anterior legs, which it uses to filter food from the water.Distribution and habitatMonocorophium acherusicum is native to Europe, but was introduced to harbours of Australia by travelling in the ballast water of ships.