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Nonetheless, all fur seals have certain features in common: the fur, generally smaller sizes, farther and longer foraging trips, smaller and more abundant prey items, and greater sexual dimorphism. For these reasons, the distinction remains useful. Fur seals comprise two genera: Callorhinus, and Arctocephalus.
The brown fur seal is the largest and most robust member of the fur seals. It has a large and broad head with a pointed snout that may be flat or turned up slightly. [ 3 ] They have external ear flaps ( pinnae ) and their whiskers ( vibrissae ) are long, possibly growing back past the pinnae, especially in adult males.
Northern fur seals have extreme sexual dimorphism, with males being 30–40% longer and more than 4.5 times heavier than adult females. [1] The head is foreshortened in both sexes because of the very short, down-curved muzzle, and small nose, which extends slightly beyond the mouth in females and moderately in males.
The subantarctic fur seal is medium in size compared with other fur seals. The two sexes are strongly sexually dimorphic: males grow to 2 m and 160 kg, whereas females are substantially smaller—1.4 m and 50 kg. Subantarctic fur seals have creamy-orange chests and faces. Their bellies are more brownish.
Instagram user Max Payne captured footage of an Antarctic fur seal swimming in South Georgia.
The fur seals’ habitat is naturally restricted which makes them more threatened by environmental changes. Other potential and existing threats are tourism, oil spills, and boat collisions. Oil spills would be particularly damaging to the fur seal as their thick pelage is an important part of their thermoregulation.
Fur seals are different from true seals because they have external ear flaps, but also true seals use their chest for support and movement, and fur seals walk on their front flippers. The Juan Fernandez fur seal is the second smallest fur seal, second only to the Galápagos fur seal. Their bodies are short and robust with brown pelage. Both the ...
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