The rest of the ocean is known as the Crater Edge, it is extremely deep and nearly devoid of life, supporting only microscopic life forms, and Leviathan Class Organisms. The Arctic supports a nearly completely different ecosystem, harboring more creatures and plants adapted to the colder temperatures. However, this is only a very small area of the planet, located in a dormant volcanic crater, approximately 2km in diameter. The Crater features a full ecosystem of flora and fauna. The Aurora is located a few meters above the surface, in relatively shallow water. The known planet is almost completely covered in water, except for a few islands, and features a variety of submerged biomes.
There are three known major ecosystems on the planet: the Crater, Sector Zero, and the Dead Zone, the latter of which covers the majority of the planet. It also harbors two moons, one being very close to the planet, causing frequent solar eclipses. Planet 4546B itself is a water planet smaller than Earth with a breathable oxygen-nitrogen atmosphere. There are at least ten other celestial bodies in the system, each of which is larger than Earth's Moon. The “B” means that 4546B was the first planet discovered around the star 4546 (or 4546A). Planet 4546B is located in the outer reaches of the Ariadne Arm, orbiting around the star 4546.
