The Mariculture Lab

Recirculating Aquaculture Systems (RAS) represent a fundamental transition in aquaculture—from managing fish within natural aquatic ecosystems to engineering the culture environment itself. This shift is redefining how aquaculture addresses resource efficiency, biosecurity, and environmental sustainability. Why this technological shift matters For most of its history, aquaculture relied on natural ecosystems to maintain water quality. Ponds, lakes, and coastal waters dilute wastes and stabilize environmental conditions through natural biological processes. Recirculating Aquaculture Systems challenge this traditional model. Instead of relying on continuous water exchange, RAS attempts to replicate those ecological processes inside an engineered system. Recirculating Aquaculture Systems (RAS) are engineered aquaculture systems that continuously recycle culture water by integrating mechanical filtration, biological nitrification, gas exchange, and water treatment processes to create a sta...