Blue whale (Balaenoptera musculus). People looking at a dead blue whale calf. National marine sanctuary, Monterey bay, California Pacific ocean, USA.

Humpback whale, (Megaptera novaeangliae) diving with California sea lions, (Zalophus californianus) following and feeding together, Monterey Bay, California, USA

Blue whale, (Balaenoptera musculus), Biologist holdindg her hand next to a vertibra for size comparison, Monterey, California, USA

Blue whale fluking up to dive (Balaenoptera musculus) Azores, Atlantic Ocean

Blue whale (Balaenoptera musculus). A blue whale tail enthralls watching tourists. Gulf of California.

Blue Whale (Balaenoptera musculus) fluke-up dive in the middle Gulf of California (Sea of Cortez), Mexico.

Blue whale (balaenoptera musculus). A blue whale tail. Gulf of California.

Blue Whale (Balaenoptera musculus). Tail Fluke above the surface before diving, Gulf of California, Mexico.

Blue Whale (Balaenoptera musculus). Tail Fluke above the surface before diving, Gulf of California, Mexico.

Blue whale (balaenoptera musculus). A blue whale tail in the afternoon light. Gulf of California.

Blue Whale (Balaenoptera musculus) Adult fluke-up dive. Gulf of California (Sea of Cortez), Mexico.

Blue Whale (Balaenoptera musculus) Mother and calf fluke-up dive in the Gulf of California (Sea of Cortez), Mexico.

Blue whale, (Balaenoptera musculus), fluking up to dive, Monterey Bay, California, USA