Hooded seal

Only males possess a unique, inflatable, balloon-like nose that they can inflate into a large red shape

Ziko van Dijk


Hooded seal

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Only males possess a unique, inflatable, balloon-like nose that they can inflate into a large red shape

Population 650,000

A remarkable marine mammal found primarily in the central and western Atlantic Ocean, ranging from Svalbard in the north to as far south as the Gulf of Maine. This species is most notable for its unique inflatable nasal sac, a key feature among adult males. This sac, which resembles a large, pink balloon, can be inflated and displayed during mating rituals as a sign of dominance and to attract females. Additionally, males have another striking characteristic: a membrane that they can inflate under their nostrils, which also plays a role in their dramatic courtship displays.

Hooded seals have a silvery-grey to blue-grey coat with black spots that vary in size across their bodies. One of the most remarkable aspects of hooded seals is their solitary nature; unlike many other seal species that form large colonies on ice or beaches, hooded seals are often found alone or in small groups, especially outside of the breeding season.

These seals are incredible divers with the ability to plunge to depths of over 1,000 meters in search of food. Their diet mainly consists of fish, squid, and occasionally shrimp. This deep-diving capability is supported by their large body size and an ability to slow their heart rate to conserve oxygen, allowing them to stay underwater for up to an hour.

Hooded seal pups, known for their strikingly different appearance, are born with a blue-black coat that they shed after about 14 months. This blue coat, which eventually gives way to the adult’s spotted grey, earns them the nickname “bluebacks.” The rapid transition from dependence to self-sufficiency is critical for their survival in the harsh, predator-filled environments of the Arctic.

Distribution

Country
Population est.
Status
Year
Comments
Arctic Ocean
2015
Atlantic Ocean
2015
Antigua & Barbuda
2015
Vagrant
Bahamas
2015
Vagrant
Bermuda
2015
Vagrant
Canada
2015
Denmark
2015
Vagrant
France
2015
Vagrant
Germany
2015
Vagrant
Greenland
2015
Iceland
2015
Ireland
2015
Vagrant
Norway
2015
Portugal
2015
Vagrant
Puerto Rico
2015
Vagrant
Russia
2015
Vagrant
Saint Barthélemy
2015
Vagrant
Spain
2015
Vagrant
Svalbard
2015
Vagrant
Turks & Caicos
2015
Vagrant
United Kingdom
2015
Vagrant
United States
2015
Vagrant

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Terrestrial / Aquatic

Altricial / Precocial

Polygamous / Monogamous

Dimorphic (size) / Monomorphic

Active: Diurnal / Nocturnal

Social behavior: Solitary / Pack / Herd

Diet: Carnivore / Herbivore / Omnivore / Piscivorous / Insectivore

Migratory: Yes / No

Domesticated: Yes / No

Dangerous: Yes / No