An Atlantic Bottle Nosed Dolphin Mother And Calf Swim Together In Vallejo Ca In 1994

File Photo: An Atlantic Bottle-Nosed Dolphin Mother And Calf Swim Together In Vallejo, Ca. In 1994. Dolphins Are The Most Heavily Researched Of All Whales With More Than 300 In Captivity In The United States Alone. Most Are On Exhibition In Aquariums, While Others Are In Marine Mammal Research Facilities At Universities And Private Foundations. (Photo By Darryl Bush/Getty Images)