The bottom line: in a fight between a polar bear and a grizzly bear, the grizzly bear reigns supreme.
However, grizzly bears are tougher than polar bears as they possess stronger and longer claws and an elongated skull with sharp and long canines that can completely separate the flesh from bone.
The researchers found it more common for members of the same species to fight over food, but also recorded previously-undocumented competitions between polar bears and brown bears, during which the grizzlies, like typical older siblings, asserted social dominance.
Adult polar bears have no natural predators except other polar bears. Cubs less than one year old sometimes are prey to wolves and other carnivores.
In the battle of the grizzly bear vs tiger, a Siberian tiger would win a fight against a grizzly bear. The Siberian tiger is an ambush predator, and it's the only big cat that comes close to the grizzly bear in terms of size and power.
Although a silverback gorilla is very fast, quite strong, and has a longer arm span, it is unlikely that a silverback could defeat the much larger and faster grizzly bear in a fair fight. The one advantage that a Silverback might have is the enormous strength of its muscles.
The gorilla and grizzly have a relatively similar bite strength, but the bear's build makes it harder for a gorilla's bite to be equally as effective. The gorilla's biggest advantage is its spry movement, whereas the grizzly's primary advantage is its claws. The grizzly is larger, but the gorilla is stronger.
However, if it comes down to one-on-one combat, the polar bear will have a huge advantage over the gorilla. A polar bear's jaw can exert up to 1,200 pounds of pressure per square inch which is twice that of the silverback gorilla.
A hippo would win a fight against a polar bear.
The hippo is larger, stronger, has better offensive powers and a defense that would allow it to last longer in a battle than a polar bear.
Crocodiles are too large and strong for bears to overcome. A fully grown saltwater crocodile would win a fight against the largest bears. Size matters in these fights and crocodiles have that advantage. Bears are undoubtedly strong, but they've never faced anything like a crocodile to know their weaknesses.
Who Would Win in a Fight Between a Grizzly Bear and a Lion? A grizzly bear would win a fight against a lion, probably with a grizzly bear breaking the lion's back or biting through its skull. The lion indeed has an advantage in terms of their skill in hunting, especially if they are attacking in a pack.
An unarmed human could not bear a grizzly bear in a fight.
Humans cannot do serious harm to a grizzly bear. It is strongly advised that you do not get near grizzly bears.
No human has even a meg-lottery chance of killing a bear unarmed and without picking up improvised weapons. Even then it would be unlikely without a large caliber firearm, skill, and some luck or distance.
On land, bears can reach speeds of 35 mph, but even the fastest swimmers can only reach about 6 mph in the water. Meanwhile, sharks can cruise at 10 mph with ease and reach 35 mph when they are closing in on their prey to kill it. Sharks have a speed advantage against bears in the water.
Among all bear species, both the grizzly bear and polar bear take the crown as the strongest. Weighing more than around 800 pounds — the maximum recorded size is twice that figure — an individual male grizzly is equivalent to around five humans in strength … and even more when enraged.
If the two were hitting each other with their claws, it's likely the brown bear would have the advantage as their claws are more adapted to swiping. If a battle between grizzlies and polar bears turned into a wrestling match, the advantage could swing to polar bears.
Adult polar bears have no natural predators, though walruses and wolves can kill them.
The elephant would win in a fight against a polar bear. Elephants are too large and powerful for the bear to do significant damage. An elephant can use its tusks to gore the polar bear, while its trunk can be used to deliver powerful blows.
Lion have more speed, but they are used to hunting in packs, not individually. So a lion would have trouble fighting a polar bear alone. But if there was a fight between a polar bear and a PACK of lions, well, then the lions would definitely win.
However, the polar bear would likely win the battle in a head-to-head fight featuring two fully grown males. Their larger mass, stronger bite force, and greater stamina would allow them to outlast the smaller, weaker tiger.
Gorillas are strong and powerful animals. They are known to be able to fight off lions and other large predators.
A gorilla would win in a fight against an orangutan. Gorillas are far better fighters and far more capable of inflicting fatal trauma on enemies. An orangutan might escape a gorilla by climbing trees, but that is not going to defeat the gorilla.
It is believed that a gorilla punch is strong enough to shatter your skull with one slam of its arm:/Between 1300 to 2700 pounds of force. Gorillas on (avg. 400 lbs) have a muscle mass density almost 4 times higher than the most heavily muscled powerful human you know.
The only predator to prey on gorillas is the leopard. Walter Baumgärtel found the remains of several gorillas after they had been killed by leopards in the Virunga Volcanoes.
A tiger would kill a gorilla in a fight. If a tiger managed to ambush a gorilla, the tiger would immediately kill it. Although the gorilla is strong, the fact is that it could not stop 600 pounds of charging muscle and teeth.