Adult Caribbean monk seals have a darker fur than the more paler and yellowish younger seals. The males are bigger than females.
The long, light-colored and smooth whiskers are characteristic for the round face of the Caribbean monk seal.
Caribbean monk seals rest on beaches in large social groups up to 100 animals, which are organized on age and life stage differences.
Caribbean monk seals live mainly on secluded islands and atolls and are found only seldom on the mainland beaches.