Tony Wu / Humpback whales (Megaptera novaengliae) male close up of his belly, with pectoral fin raised, taken during a heat run. Vava'u, Kingdom of Tonga. Pacific Ocean.

Enrique Lopez-Tapia / Humpback whale (Megaptera novaengliae) surfacing, Wilhelmina Bay, Gerlache Strait, Antarctic Peninsula, Antarctica

Enrique Lopez-Tapia / Humpback whale (Megaptera novaengliae) surfacing, Wilhelmina Bay, Gerlache Strait. Antarctic Peninsula, Antarctica.

Enrique Lopez-Tapia / Humpback whale (Megaptera novaengliae) surfacing, Antarctic Peninsula, Antarctica

Enrique Lopez-Tapia,Enrique Lopez-Tapia / Humpback whale (Megaptera novaengliae) flipper above the surface after breaching, Wilhelmina Bay, Gerlache Strait. Antarctic Peninsula, Antarctica

Mark Carwardine / Whale watching tourist boats overcrowd diving Humpback whale, New England, USA

Mark Carwardine / Watching Humpback whale from inflatable, Antarctica {Megaptera novaengliae}

Mark Carwardine / Humpback whale, pectoral fin slapping water {Megaptera novaengliae} Ecuador, Machalilla

Mark Carwardine / Humpback whale lying on back with pectoral fins in air {Megaptera novaengliae}

Mark Carwardine / Watching Humpback whale from boat, New England, USA {Megaptera novaengliae}

Mark Carwardine / Humpback whale lobtailing {Megaptera novaengliae} Dominican Republic, Caribbean

Mark Carwardine / Humpback whale fluking {Megaptera novaengliae} Atlantic, USA