This is about a planet I made up, and it includes dinosaurs and aliens, Xenomorphs, Predators, so on and so fourth. Any alien life form or prehistoric animal is generally included. It is alot like earth, with forests, deserts, grassland, savannah, mountains, oceans, and so on.
Aside from the normally familiar plants, there is alien flora like red mountain spike, a plant that grows high in mountains, and in the highest of forests, there are plants that act like plates, absorbing rainfall into their stems. But aside from the terrain, the planet is extremely dangerous, with so many types of dangerous creatures, plants, and other hazards.
There are two known sessile predators(life-forms that blend animal and plant traits), the Butchertree, and the forest Ghost Trap. For the Butchertree's victims, it is usually quick, but extremely painful, with one of four long, sharp legs impaling a hapless animal. The death of a Ghost Trap victim is far more painful, after getting caught, a prey animal is pulled into the mouth by tentacles, and dissolved in a stomach alive. These animals appear in Alien Plant/ Expedition and Aurelia and Blue Moon respectively.
The most feared land predators are also some of the largest. The first is the enourmous Tyrannosaurus Rex, and I don't need to give a description do I? Thanators are half the size of T-rex, but are just as dangerous, they have 10 pads on the back of their head that stick up when they are about to attack, and half sharp claws on their feet. The last is the Arrowtongue, slightly larger then a Thanator but smaller then a T-rex. These liquivores have tongues that are as sharp as razor blades, and as quick as chameleons, which can slash open even the thickest hide, they are also the fastest of the three giant predators, and easily a match for any.
Other smaller carnivores include Raptors, which inhabit the entire planet, and Bio-Raptors, creatures that appear in Pitch Black, but are less sensitive to light then their cousins in the movie. Viperwolves are nocturnal, hyena like predators that are very succesful, though they prefer forests over open woodland.
The sky is no safer, pterosaurs are actually the least dangerous, and are often prey to other, far more dangerous predators. The Stalker is a colony animal that appeared in Aurelia and Blue moon, that lives in the planets forests, attacking other air creatures. The Skewer is perhaps the planet's most potent predator, for when it attacks, a kill is nearly guaranteed, and no victim survives its long, deadly lance. The largest predator on the planet as a whole is the enourmous Leonopteryx(A predator that appears in James Cameron's avatar as the giant, orange flying creature) which prowls through the air, and will violently attack any animal when it is hungry, even the Alpha predators are fearful of this predator.
Surprisingly, there are several sapient or semi-sapient species, including Humans, Na'vi, Eosapiens, Xenomorphs, Predators, Martians(Steven Spielberg's War of the World's species). Most of the time, peace is the norm, although their are often conflicts between them.
The Human race are some of the most advanced, but are also the most vulnerable, they survived only by their intelligence. Na'vi are far more peaceful, and often mediate conflicts betweem the other sapient species. Eosapiens are the largest, though they are respectful and gentle with other sapients, they are deadly hunters that can create cages when throwing their clubs at prey.
Xenomorphs are by far the most dangerous, and live in small villages in the forests or plains. Because they evolved alongside other sapients on this planet, they will rarely attack other species, although their prowess in fighting makes them a favorite ally of other races.
Predators will, like Xenomorphs, generally leave other sapients alone, although they have been known to sometimes hunt other sapients when they're at war with them. Some have even been sighted hunting alongside Humans.
Martians are the most advanced technologically, and have built vast cities in the desert regions, and have constructed Giant Tripods which they use in wars against their enemies.
The sapient species all live in independent nations and tribes across the planet, and are known to trade with eachother. A major conflict was largely avoided due to the Na'vi's mediation, specifically the conflict occured when predators accidentally destroyed a human village, and the Martians backed the Humans, while the Xenomorphs backed the Predators, war would have been disastrous.
A/N: I had this idea for a long time, and decided to write about it, and incorporated my favorite aliens, dinosaurs, and other life into this planet. This isn't meant to be copyright, and all alien species belong to their respective creators, this is just for fun, if you want me to add anymore species request it below.