Cystophora cristata, commonly known as the hooded seal, is notable for its unique inflatable nasal sac found in males. These seals inhabit the frigid waters of the North Atlantic and Arctic Oceans. They are solitary creatures, known for their impressive diving abilities and remarkable adaptations to cold environments.

North Atlantic Ocean and Arctic regions

Cystophora cristata, commonly known as the hooded seal, is native to the cold waters of the North Atlantic Ocean and adjacent Arctic regions. This species typically inhabits areas with pack ice, especially during breeding and molting seasons. The environmental conditions are characterized by frigid temperatures, presence of sea ice, and harsh weather conditions.

The ecological niche of the hooded seal includes its role as a predator of fish and invertebrates in the marine food web. It primarily feeds on a variety of fish species and squid, utilizing its agile swimming capabilities. The hooded seal is specially adapted to life in icy waters, with a thick blubber layer and the ability to dive to significant depths to forage for food. It is also known for its unique breeding behavior on ice floes, where males display their distinctive nasal sacs during mating rituals.