Gammarus Shrimp: Underwater Cleanup Crew
These small crustaceans break down dead plant matter and debris in water, supporting nutrient cycling in aquaponic systems. Each shrimp processes 5-10mg of detritus daily, increasing available nutrients for plants. Their tolerance of low oxygen levels (down to 5%) suits early Martian habitats with predominantly CO₂ atmospheres. Modular aquaponic units could integrate their waste processing with plant growth, efficiently closing nutrient cycles.