Since the Suez Canal opened more than a century and a half ago, the Mediterranean has been quietly receiving emissaries from the Red Sea — over 120 fish species that crossed an engineered threshold and remade an ancient ecosystem. Researchers at Tel Aviv University have now built a statistical model to anticipate who comes next, finding that the most successful migrants are not the most adaptable in the conventional sense, but rather those least bound to the coral worlds they left behind. In a warming Mediterranean, the ability to see an invasion before it arrives may prove as consequential as