Delta Rana IV is a planet in the Delta Rana system. The planet is designated as a "protected" planet where endangered lifeforms from different worlds can be brought so their numbers can increase again and later be reestablished on their homeworlds. Delta Rana IV is one of two large protected planets in Earth territory. The other being Brentalia. Like Brentalia, the planet is almost like the Earth, only it has several oceans and three continents in the shape of North America, Africa and Australia. The planet was designated as protected in 2090, the Earth Federation transported its most endangered animals to the planet.