Animals with no natural predators are called apex predators, because they sit at the top (or apex) of the food chain. The list is indefinite, but it includes lions, grizzly bears, crocodiles, giant constrictor snakes, wolves, sharks, electric eels, giant jellyfish, killer whales, polar bears, and arguably, humans.
Killer Whale (Orcinus orca)
Apex predator – and one of the world's largest carnivores – orca are also known as killer whales, though they are actually the largest animal in the Delphinidae family of oceanic dolphins. At 8 meters long and 5,400 kg, an average-sized orca can eat up to 230 kg of food a day.
Given their tremendous size and strength, and because they gather in groups, elephants have few predators to worry about. Lions, hyenas, and crocodiles may attempt to prey on young or sick elephants.
Elephants and rhinos usually do not have any predators that they flee from.
Pinnipeds (seals and sea lions) aren't the only marine mammals that have snacked on a shark. The sperm whale is a marine mammal that is considered an apex predator in certain habitats and it has been recorded as having eaten shark eggs.
Do orcas have predators? Orcas are apex predators, which means they're at the very top of the food chain and they have no predators. Killer whales are some of the largest and most powerful animals in the ocean, and no other predator is able to challenge them.
Moray eels, fish, seals, sperm whales, sea otters, and many birds prey on octopuses.
Quokkas, famous for posing in selfies, are native to Rottnest Island where about 10,000 live a sheltered life free from predators or traffic. They are classified as a vulnerable species and have been almost completely wiped out on the mainland.
The new species, Galeamopus pabsti, measured well over 66 feet long and weighed more than 15 tons. It lived 150 million years ago and is described in the journal PeerJ.
Many but not all carnivorans are meat eaters; a few, such as the large and small cats (felidae) are obligate carnivores (see below). Other classes of carnivore are highly variable.
But despite their size and strength, there are animals that do prey on them. Man appears to be their biggest predator. 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.
No predators hunt lions to eat them; however, they do have a few natural enemies, such as hyenas and cheetahs. Hyenas compete with lions for food and often try to steal their kills.
Mammal with the Weakest Bite Force: Anteaters
When discussing carnivores – from domestic dogs to wild predators like sharks and big cats – bite force is often a topic of interest.
#1 World's Scariest Animal: Nile Crocodile
Nile crocodile (Crocodylus niloticus) swallowing an Impala in the Kruger National Park, South Africa. All species of crocodiles attack approximately 1,000 worldwide annually, and about 40% of those attacks are fatal.
A. attenboroughii is thought to be one of the first cnidarians, a group including coral and jellyfish, and dates back over 560 million years. The lead author of a paper describing its fossil, Dr Frankie Dunn, says, 'This is very different to the other fossils in Charnwood Forest and around the world. '
Other than birds, however, there is no scientific evidence that any dinosaurs, such as Tyrannosaurus, Velociraptor, Apatosaurus, Stegosaurus, or Triceratops, are still alive. These, and all other non-avian dinosaurs became extinct at least 65 million years ago at the end of the Cretaceous Period.
Except for some carnivorous dinosaurs, Tyrannosaurus rex is also afraid to provoke some herbivorous dinosaurs, and Ankylosaurus is one of them. It was equipped with a powerful tail club that could be swung with enough force to shatter bone.
A Tyrannosaurus Rex might be known for its ferocious bite, but now scientists say a caiman that lived eight million years ago, had a bite TWICE as powerful. Known as Purussaurus brasiliensis, the reptilian predator lived in the Amazon region in South America.
But the quokkas on Rottnest are the friendliest fauna in the Australian outback, always ready to smile for a selfie. Since there are no predators on the island, these marsupials don't live a life of threat or fear, and are welcoming to the 770,000 tourists that visit the island annually.
It's Natural to assume that animals with large teeth and aggressive reputation animals like lions or poisonous snakes are the world's deadliest killers. But appearance not sufficient to judge the creature's deadliness. Mosquito has recorded the maximum killing of people every year.
The honey badger has been called the world's most fearless animal because it doesn't hesitate to attack animals much larger than itself- even lions and crocodiles!
Natural Predators
Among the predators of the jellyfish, the following have been identified: ocean sunfish, grey triggerfish, turtles (especially the leatherback sea turtle), some seabirds (such as the fulmars), the whale shark, some crabs (such as the arrow and hermit crabs), some whales (such as the humpbacks).
Octopuses have sharp beaks and can deliver venomous bites. A woman's ill-advised photo attempt with an octopus recently went horribly wrong: After she draped the cephalopod on her face, the octopus dug in with its suckers and bit her on the chin, causing a painful infection that sent her to the emergency room.
According to UC Berkeley biologists, Pacific striped octopuses share food, cohabit for several days while mating, and even appear to kiss while they grasp each other beak-to-beak – in what academics describe as "rough sex".