The crab eating fox does not have a set breeding season. Females can come into oestrus twice a year. Gestation period is 52-59 days. Three to six pups are born in a den that is normally taken over from another animal. The young are mature at 8 months, and will leave their parents.
Females reach sexual maturity at one year.
They occur mainly in pairs, and are not territorial. Often, many crab eating foxes are found in the same area. Small family groups may form.