sea otters partner with one other mate for life. The monogamous couple forms a family group consisting of them and their offspring. They do everything together, including traveling, playing, and hunting.American, spot-necked, smooth, and marine otters in North American zoological facilities mate during winter and spring. Sea otters breed throughout the year. Males may breed with more than one female during the year. Sea otters are capable of giving birth every year, but females usually experience much longer birth intervals.