Imperia is ridden with mountains and deserts across the planet, and anything else is almost completely covered by forests of gigantic size. The sea also covers about ninety percent of the surface of the planet. It has an RLM of 4, the highest in the area.
The dominant species of Imperia are, of course, the Duelliki. The planet also contains incredible marine life (which makes up more than 98% of the planets wildlife). It also contains a number of large reptiles, somewhat similiar to earth dinosaurs, many of these aquatic.