Britannica
Sources used in this answer
Why are polar bears adapted to living on sea ice?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
bear
Grizzly bear in Jasper National Park, western Alberta, Canada.
Polar bears are highly specialized for life on sea ice, which serves as their primary habitat for hunting, traveling, and mating. Their adaptations for this environment include:1
- Hunting Efficiency: Polar bears rely on sea ice to stalk seals, their primary prey. They utilize natural fractures in the ice to ambush seals that surface for air.12
- Locomotion: Their broad feet feature hairy soles and uneven skin, which provide essential traction and prevent slipping on frozen surfaces.1
- Camouflage: Their colorless, hollow hair shafts scatter and reflect light, giving them a white appearance that acts as effective camouflage against the snowy Arctic backdrop, allowing them to approach prey undetected.3
- Insulation: To survive frigid temperatures, they possess a dense undercoat, a thick layer of fat, and black skin that absorbs heat from sunlight.31
Because they depend on these ice floes to access their aquatic prey, the ongoing reduction of sea ice due to global warming poses a severe threat to their survival, leading to increased starvation and reduced reproductive success.12