Antarctic minke whale bias because some minke whales would have been outside the surveyable ice edge boundaries. Antarctic minke whales become sexually mature at 5 to 8 years of age for males and 7 to 9 years of age for females. Both become physically mature at about 18 years of age. After a gestation period of about 10 months, a single calf of is born – twin and triplet fetuses have been reported, but are rare. After a lactation period of about six months, the calf is weaned at a length of . The calving interval is estimated to be about 12.5 to
Antarctic minke whale dark gray dorsally and clean white (occasionally light gray to gray) ventrally with a thin, dusky margin. Some small, dark gray "speckling" may be present on the body. Antarctic minkes lack the bright white, transverse "flipper band" of the common minke and the white "shoulder blaze" and bright white "flipper patch" (occupying the proximal two-thirds of the flipper) of the dwarf minke. Instead, their narrow, pointed flippers, about one-sixth to one-eighth of the total body length, are normally either a plain light gray with an almost white leading edge and a darker gray trailing edge or two-toned, with a thin