Dolphins eat fish, squid and crustaceans. The dolphins take turns plowing through the schools of fish to. Dolphin Life Cycle Clipart Set Download - Clipart 4 School Life Cycles Animal Life Cycles Dolphins The baby is born, the calf grows and reaches puberty, it then mates with another dolphin of the opposite sex, the dolphin fetus gestates in the female’s womb for a period of time before it is born and the cycle begins all over again. Dolphin life cycle information . As mammals, they have warm blood and nurse their young. Dolphin vary in color, but they are generally gray with darker backs than the rest of their bodies. Most dolphin species have a long lifespan. Dolphins mate throughout the year. The largest member of the dolphin family is the orca, also known as the killer whale. Adult dolphins give birth to live young and suckle (feed their babies using breasts or a teat) them. Under 9 ft long 440 lbs (may be larger as adults) small. They can reach swimming spee...