I saw a Right Whale with calf from a schooner in the Gulf of Maine about 20 years ago. I had no idea there were so few of them, or that the european Right Whale population had been long hunted to extinction.
Along our American coast, with a few conservation efforts, their numbers are slowly recovering. Still, 350-400 is about as close to extinction as a species can get. Whales are as easy to kill as cows.
Magnificent critters.
Photo from the NYT article.