Much of its success is due to its ability to swim out to sea and colonise new locations, but it is not restricted to the marine environment and spends much time in estuaries, rivers, and large lakes.
Gran parte do seu éxito débese á súa capacidade de nadar polo mar e colonizar novos lugares, pero non está restrinxido a ambientes mariños e pasa moito tempo nos estuarios, ríos e grandes lagos.