Shellies are seven morsels that supply one material they are made of. There are however exceptions to it, being the Shelly Spirit and Big Shelly. There are unique characteristics to each shelly though. Shelly Spirits drop nothing, and is meant for exp. Big Shellies drop numerous rock shellies, iron shellies, and one adurite shellies. (The Big Shelly is one of the many ways to obtain gold and one of the few ways to obtain adurite), the coal shelly is limited to Outcast Island, and the iron shelly can appear on small land spots in the sea. Also, there are magnetite shellies whice come from the meteor.