Southern Right whale Eubalaena australis mating aggregation in Atlantic, aerial

southern right whale eubalaena australis mating aggregation atlantic ecotourism annual migration wildlife balaenidae aquatic hermanus ocean whales aerial aquatic wildlife walker bay marine life float surface annual migration mating ritual aquatic mammal right whale drone polygamous endangered species cetacea cape whale coast courtship compete south africa polyandrous mating group whale watching cetacean eubalaena endangered animal marine nature sea overstrand coastal waters callosities