A recirculating aquaculture system (RAS) is a method of fish farming that uses a closed-loop system to continuously filter and recycle water. It is an environmentally sustainable approach that minimizes water usage and reduces the release of pollutants into the environment. In a RAS, fish are raised in tanks or ponds, and the water is continually circulated through a series of filtration systems to remove waste products and maintain optimal water quality. The filtered water is then returned back

52 reactions · 4 comments | What does a RAS mutation mean, and what is a KRAS biomarker? Watch the video to learn more about this gene, and visit our website to learn about when and how you should have biomarker testing for a RAS gene, the treatment options if you have a mutation, and what to ask your doctor: bit.ly/BiomarkerKRAS Special thanks to Amgen for supporting the development of this educational material. | Colorectal Cancer Alliance | Facebook