Nothing. Probably some long-dead bacteria or whatnot.
The biggest moon of Mars is called Phobos. It is also one of the two moons of Mars, with the other being Deimos.
Mars is the fourth planet from the Sun in our solar system, so it's not the biggest, second biggest, or third biggest planet. The biggest planet is Jupiter, followed by Saturn (second biggest), and then Uranus and Neptune (third and fourth biggest respectively), before we get to Mars.
Mars one
No animal has ever been on Mars.
Mars
the biggest animal in Montana is the bison
No there is no life on mars, animal or plant.
There are no rivers on mars. It is a completely life-less planet.
The biggest animal to ever live is the Blue Whale.
The biggest animal on foot is probably an elephant.
The biggest animal on earth is the blue whale.
the biggest animal in desert is camel