Did you know... - a baby California gray whale weighs over 1,000 pounds? - their ancestors have been on earth for more than 30 million years? - they travel more than 10,000 miles every year? Read about the California gray whale's fascinating past and environmental concerns for its future. Although 'What is a California Gray Whale?' is designed for primary grade children, it is of interest to older children studying nature and may also be read to and enjoyed by preschoolers.