They don't look like clouds to me, but if they are that is not a surprise, I have seen some photos of Mars clouds, both taken from orbit or from the
ground.
Not sure about clouds, the blurry parts look more like sand partially covering dark areas. There are mighty sand storms and moving dunes there.
The dark areas are more interesting. What are they? Ice? Last time I checked, ice is white. Pools of liquid water? Not likely with the very low
atmospheric pressure. Maybe micro-organisms or vegetation with dark heat-absorbing color?