A baby dolphin is called a "pup" or a "calf." Female dolphins are pregnant for 12 months, and baby dolphins are born tail-first so that they don't drown while coming through the birth canal. Dolphins breed year-round, which means baby dolphins can be born in any season.
Baby dolphins stay with their mothers for the first three to six years of their lives. They nurse for the first 12 to 18 months and then are taught how to hunt by their mothers. Female dolphins are called "cows." Male dolphins are called "bulls," and a group of dolphins is called a "herd," "pod" or "school."