White whale rolls on its back on top of its mom

white whale calf right whale right whales whale watching whale whales cetacean cetacea calf south africa hermanus aquatic wildlife marine life aquatic mammal wildlife overberg aerial sealife swim ecotourism walker bay sea curious behavior animal tourist attraction eubalaena australis ocean lighter coloration calving season tourism top down balaenidae coastline nature coastal marine scenic overstrand open mouth travel roll on back mom white pigmentation southern right pigmentation pattern eubalaena brindle