"The endangered dugong is the only southern African sea cow. This ancient order (Sirenia) is distantly related to elephants and also includes the West African and tropical American manatees. Dugongs are slow-moving, entirely aquatic creatures of sheltered tropical waters, where they graze seagrass beds with the rising tide." www.bradtguides.com
In the seas above the Arctic circle lives the Narwhal, the ‘unicorn of the sea’. Narwhals are unique in that they have a swordlike, spiral tusk that grows right through their upper lip. Swimming in groups of hundreds of individuals, these unique mammals dive to extreme depths under the arctic ice. Read more on mudfooted.com
cage diving with great whites-The Farallon Islands located 28 miles West of San Francisco has a lot of great whites sharks because of the large elephant seal population. Also, Guadalupe Island located 210 miles West from Baja, Mexico has large number of great whites but with more of a deadly nature because of the warm water temperatures. Must do one of these!