California gray whale (Eschrichtius robustus) caudal peduncle, San Ignacio Lagoon, Baja California Sur, Mexico, North America

Caudal peduncle of thresher shark (Alopias sp.), showing finning scar, Nanfang'ao fish market, Suao, Taipei, Taiwan, Asia

Pacific humpback whale adult, Megaptera novaeangliae, competitive male, head-lunging, blow, in the Au Au Channel near Maui, Hawaii.

Pacific humpback whale adult,Megaptera novaeangliae, tail-lobbing in the Au Au Channel near Maui, Hawaii

Pacific humpback whale adult,Megaptera novaeangliae, fluke-up dive in the Au Au Channel near Maui, Hawaii

Pacific humpback whale calf, Megaptera novaeangliae, breaching in the Au Au Channel near Maui, Hawaii.

Pacific humpback whale calf,Megaptera novaeangliae, breaching off the west coast of Maui, Hawaii.

Pacific humpback whale adult female, Megaptera novaeangliae, with wounds/scar on flukes, Maui, Hawaii.

Pacific humpback whale adult female, Megaptera novaeangliae, with wounds/scar on flukes, Maui, Hawaii.

Pacific humpback whale calf, Megaptera novaeangliae, breaching in the roadstead near Mala Wharf, Maui, Hawaii.

Pacific humpback whale adult, Megaptera novaeangliae, breaching in the Au Au Channel near Lanai, Hawaii.

Pacific humpback whale calf, Megaptera novaeangliae, breaching in the Au Au Channel near Maui, Hawaii.