A medium-sized seal — among the rarest seals on Earth with fewer than 1,500 individuals. The only seal endemic to Hawaii, evolved over millions of years in isolation.

§ Quick facts

SizeBody 2.1–2.4 m (7–8 ft)
Weight170–270 kg (375–600 lb); females slightly larger than males
LifespanWild 25–30 years
OrderCarnivora
FamilyPhocidae

§ Encyclopedia

The Hawaiian monk seal is a vulnerable species of earless seal in the family Phocidae that is endemic to the Hawaiian Islands.

Source: Wikipedia — Hawaiian monk seal Licensed under CC BY-SA 4.0

§ Identification

Field marks. Silvery-gray body with light belly; pups born jet-black, molt to gray. Round face with large dark eyes.

Similar species. Other monk seal species (different oceans). Northern Fur Seal (visible external ears, longer flippers).

Voice. Bleats and growls on land; underwater vocalizations during courtship.

§ Diet & behavior

Diet. Fish (reef and bottom-dwelling species), octopus, squid, lobster, eels. Forages at depths to 500 m.

Behavior. One of only two monk seal species remaining (Mediterranean and Hawaiian; Caribbean monk seal extinct since 1952). Population fewer than 1,600 individuals; one of the most endangered marine mammals on Earth. Recovery program has slowed but not reversed decline.

§ Range

Endemic to Hawaiian Islands

§ Habitat

Beaches, coral atolls, near-shore marine waters

§ Threats

Entanglement in marine debris, climate-driven reef changes, toxoplasmosis from feral cats, beach disturbance.

§ Conservation status

According to the IUCN Red List, the hawaiian monk seal is currently classified as Endangered.

§ What helps

Don't approach seals on beaches (200 ft minimum). Pick up trash. Keep cats indoors. Donate to NOAA Hawaiian Monk Seal Program.

Support our work More ways to help

§ Further reading

§ Sources cited

  • NOAA Pacific Islands Fisheries Science Center
  • USFWS
  • Marine Mammal Center
  • IUCN Red List 2015