Antarctic Krill: Cold-Water Specialists
These crustaceans thrive in conditions that would challenge most aquatic life: cold, low-oxygen waters similar to potential Martian subsurface brines. They process 10-15% of their body weight in algae daily, enhancing water nutrient cycles. Their tolerance of temperatures down to -2°C aligns perfectly with Mars’ subsurface conditions. The challenge? They require large-scale aquatic systems, making them better suited for established colonies rather than initial settlements.