Humpback whale numbers on the rise

The number of humpback whales in the North Pacific Ocean could be higher than previously thought.

2008 estimates placed the number of humpback whales at just under 20,000 but recent research suggests the population might now be greater than 21,000.

The growth suggests humpback whale populations are still recovering well from the effects of commercial whaling, which ended in the North Pacific Ocean in 1966.

At the time, humpback whale numbers were estimated to be as low as only 1,400.

Read more at NOAA National Marine Fisheries Service