Is There Anything About the Water on Mars That Makes Multi Cellular Life Less Likely?

If we took multi cellular life from earth and put it in like an analogue martian water, it would not survive. Itis a requirement to have a certain amount of oxygen dissolved in water for that to happen. But we know that evolution does a good jobo selecting for things that can live in weird situations. And prechlorates definitely are a harsh chemical, but maybe a few evolved in that situation.