Author William Gordon Burn Murdoch (1862–1939)
English: Shows Captive Bear Cubs, Brother and Sister;and Ice Beginning to Form on the Sea Waves
Subject: Polar bear
Tag: Aquatic Mammals
Date 1917
Source/Photographer
English: Murdoch, W. G. (William Gordon) (1917) Modern Whaling and Bear-Hunting, London: Seeley, Service and Co.: Ltd.
Source: https://commons.wikimedia.org/wiki/File:FMIB_32670_Shows_Captive_Bear_Cubs,_Brother_and_Sister;and_Ice_Beginning_to_Form_on_the_Sea_Waves.jpeg

The polar bear (Ursus maritimus) is a carnivorous bear whose native range lies largely within the Arctic Circle, encompassing the Arctic Ocean, its surrounding seas and surrounding land masses. It has evolved to occupy a narrower ecological niche, with many body characteristics adapted for cold temperatures, for moving across snow, ice and open water, and for hunting seals, which make up most of its diet.