Dominant individuals may also display their body size while swimming at the water surface, and a subordinate will submit by holding its head at an acute angle with the jaws open before retreating underwater.
Os individuos dominantes poden ademais exhibir o seu tamaño corporal mentres nadan na superficie de auga, e un subordinado sométese colocando a cabeza nun ángulo agudo coas mandíbulas abertas antes de retirarse baixo a auga.