Coming on June 11 is the first ever elder dragon in Monster Hunter Online, Tartaronis. It's the first time that this dragon appears in Monster Hunter series and Tartaronis is by far the most mysterious and powerful monster in MHO.
With gigantic body, Tartaronis is like a huge sea turtle with flipper-like arms and legs. It has thorns on its back that help protect the body and attack the enemy if needed. Tartaronis usually comes out with disastrous climate change. It brings to the desert of Moonrise tornado and sand storm and thus this beast is called "fiend of withered sea" by the locals.