that's the polar cap iirc

the red circle is
not an ice cap, i dont think its even a spot of water either, looks like all the other craters actually. if it was even the ice cap, it would be a almost solid white because its
ice, the water would be a light blue. mars doesnt even have abundance of water so its hard to tell if it is or not from the picture. and to add to that, mars' orbit is not tilted like urstar fish' orbit, in which it rotates on its side, but mars orbits like every other generic planet in our solar system.