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This a good-news story about sea life. Scientists have that the numbers of blue whales in the eastern Pacific Ocean the highest they have in over a century. Researchers at the University of Washington report that there are now over 2,200 blue whales between Mexico and Alaska. Hunters nearly all the blue whales in that area and were to extinction. Whaling illegal in 1971 and the numbers of the world's largest mammal started . It has over 40 years for the blue whale to . Lead researcher Dr Cole Monnahan was very happy at this positive news. He said: "For us, this is a great conservation success story."

Dr Monnahan said the number of 2,200 blue whales in the area might not any further. He said: "Before this study, some people that number should be up, but if there were about 2,200 whales to with, then that is what the environment can ." Monnahan warned that the creature still needs to be , saying: "California blue whales are because we took actions to stop catches and start . If we hadn't, the population might have been to near extinction." He added that: "The recovery of California blue whales from whaling the ability of blue whale populations to rebuild under careful management and conservation measures."