Young challenger bull southern elephant seal (Mirounga leonina) fleeing from beachmaster bull, South Georgia Island, Polar Regions

young seal challenger bull mirounga leonina beachmaster bull fleeing seal polar regions marine mammal wildlife ocean territory seal behavior animal interaction nature coastal habitat sexual dimorphism predator prey seal colony beach south atlantic antarctica marine ecosystem seal migrations natural behavior cold climate seal anatomy large mammals conservation ecology biodiversity natural history coastal environment animal communication subantarctic marine life flippers seal population mammal behavior young males social hierarchy aquatic mammals foraging habitat competition natural habitat pinniped seasonal behavior animal movement seal lifecycles polar wildlife animal survival