If it weren t for their geographical separation, Caribbean Monk Seals and the Hawaiian Monk Seals would be charted as the same species. Some seals make noise in their sleep. Their mouths may be closed, but a rythmic thumping of baritone notes can be heard. Baby Monk Seals are called pups . Every two years, between March and July, female Monk Seals come on shore to give birth to one black pup.
Pups average three feet in size and weighing thirty pounds at birth.
They range 150 - 200 pounds just before weaning. In 1981 a tagging program was started to monitor the Monk Seal . This system helps to track where the seals go. The tags are coded with letters and numbers. Some are coded with colors which would make it color coded .