There were once three types of monk seals in the world. Today there are only two. The names of the three monk seals are the Hawaiian Monk Seal, the Carribean Monk Seal and the Mediterranian Monk Seal. Last seen in 1952, the Caribean Monk Seal is considered extinct. 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.