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.
An alligator would be dead or dying/incapacitated in the polar bear's habitat, and the polar bear would not be at its best in a hot SE US swamp. Alligators primarily eat fish, but will take small mammals when they get the chance.
Adult polar bears have no natural predators, though walruses and wolves can kill them.
Big cats like leopards and panthers sometimes kill and eat these big reptiles. Large snakes can also do a lot of damage to alligators and crocodiles.
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.
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.
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.
Even though saltwater crocodiles are large and armored, they're not strong enough to fight off a killer whale. If orcas can kill great white sharks, they can kill saltwater crocodiles.
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. Newborn cubs may be cannibalized by malnourished mothers or adult male polar bears.
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.
On land, tigers have a clear speed advantage. In the water, however, polar bears are going to come out on top every time.
An elephant would win in a polar bear vs elephant fight. The elephant is simply too large for the bear to do anything meaningful against. The polar bear can't exactly leap onto an elephant's back, so it would only be able to attack the elephant's legs and stomach area.
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 the lion has a lot of advantages over the crocodile in terms of a fight, the crocodile would win in a fight against a lion. The crocodile is simply too large and powerful for the lion to defeat.
In conclusion, I think that the only animal a crocodile genuinely fears is the hippo. Smaller crocodiles may fear larger ones due to risk of cannibalism but that's pretty explainable. Animals that a crocodile may avoid due to unnecessary risk include elephants, lions, and rhinos.
A hippo would win a fight against a crocodile. Although crocodiles are large, powerful creatures, they cannot kill a fully-grown hippo. Hippos are large, round animals that are much taller than crocodiles. The only place they would be vulnerable to attack is their legs.
Like other eaters of the Devil Fruit, he cannot swim and loses his powers when immersed in water or touched by seastone, but another unique weakness is that he loses his ability to turn into sand when he is soaked in water or is touched by something soaked in water.
Although adult crocodiles have no natural predators other than humans, hatchlings have a high mortality rate and are preyed upon by other wildlife including raccoons, birds, and crabs.
Lions have few predators to fear other than humans. A very young or sickly lion might fall prey to hyenas. Cubs may be attacked and eaten by adult male lions. Lions are most threatened by humans who hunt them and encroach on their habitat.
The pairing is unusual because normally, crocodiles eat hippo calves, and hippos will usually only play within their species. The unlikely match doesn't last too long. The croc gets its way when a herd of elephants come along and chase the hippo away.
Ayotte made headlines around the world in November 2013 when he rescued Montrealer Erin Greene, 32, from a polar bear attack in Churchill. Ayotte beat the bear with a shovel, which distracted it long enough for Greene to escape.