The Hawaiian Monk Seal is an endangered seal that is endemic to the waters around the Hawaiian Islands. Known to the native Hawaiians as ʻIlio holo i ka uaua (dog that runs in rough waters), they get their common name from their bald appearance, solitary habits, and folds of skin around their heads which resembles a monk's hood. Nearly 90% of Hawaiian Monk Seals live around the tiny, uninhabited islands and atolls in the upper reaches of the Hawaiian archipelago.
The Hawaiian monk seal occurs only in the Central Pacific, in the mostly uninhabited northwestern Hawaiian Islands, with a small breeding population inhabiting the main Hawaiian Islands
Hawaiian monk seals give birth to one pup only, to which they will nurse for up to six weeks, but they have also been known to nurse other females pups.
One at a time, on the beach and probably at night, as these severely endangered (and cute) pinnipeds are primarily nocturnal.
See the related link below for more information:
Jaguars have 4 babies in one birth
66
Margays give birth to a single kitten.
2-3 babies
how many people give birth
1-5
1 camel
over 9000
One
10,000 3/4 babies
4-6 cubs
they can have about 4-6 babies