Delta and Dawn
Not to be outdone by the famous Humphrey, fellow humpbacks Delta and her daughter, Dawn (pictured), swam 75 miles into the Sacramento River Delta in 2007, farther inland than any known humpback in history.
Rescue teams soon discovered that both whales had trauma wounds, likely caused by boat motors. The wounds soon became infected, so the team used a specially designed dart gun to administer antibiotics to both Delta and Dawn. This helped them recover enough to swim back to sea — but only after spending nearly two weeks in freshwater.