Super muscly red sea bream to be sold in Japan

1 November 2021 / Plans have been announced in Japan to begin marketing red sea bream genetically engineered (GE) with CRISPR/Cas. The gene editing tool was used in the fish to block gene functions which regulate muscle growth. As a result, the fish not only grow more muscle, they also have a larger-sized body, reduced body length and abnormal positioning of the vertebrae. In comparison to the wild type, the fish gains weight faster and appears to move more slowly.