#2 Gray Whale
Gray Whales are also blessed with a long lifespan, aging up to 77 years. The most impressive fact about these whales is their comeback from the brink of extinction.
Due to large-scale hunting and whaling, Gray Whales were almost facing extinction by the first few years of the 20th century. However, serious and constant conservation efforts aided in their survival.
Today, Gray Whales have a stable population and are part of the Least Concern group on the IUCN list.