Are there any cases where dolphins have killed sharks?
Shark vs. Dolphin Battles Can Have Surprising Outcomes : DNewsDolphin PredatorsYes, though dolphins have much more stamina and speed and manuverability than sharks, so they can usually avoid predation just by swimming away--unless they're protecting a baby or a sick/old member of the pod, in which case they're often able to kill a shark not by biting but by ramming the shark's belly and/or gills, which can cause internal injuries to the shark. Dolphin teeth are more for catching fish than for tearing apart large prey, as sharks' teeth are. And sharks have very tough skins--hard to tear.But dolphins have a hard rostrum--beak--that's perfect for ramming. Sharks can and do kill and eat dolphins, which are highly nutritious for a shark. Dolphins aren't equipped to eat sharks, however, except for Orcas, which while called a whale, are really the largest species of dolphin. For other dolphins, then, they have no reason to kill a shark for food--just for defense--and dolphins have been known to swim off when a shark attacks one member of a pod. We don't really know when dolphins would attack sharks, just that it does happen, but it isn't a regular thing. Dolphins do catch and torture juvenile sharks, the way a cat plays with a mouse before killing it. Most usual is dolphins driving off sharks trying to prey on calves in a pod by ramming. Some sharks will later on die of internal injuries from the ramming, while others recover. The dolphins' purpose isn't to kill the shark but to make it go away. I don't think they would usually pursue a shark that stops trying to kill a dolphin calf, because that would mean leaving the calf defenseless.Dolphin protects calf from shark attacks
Who would win: An orca (killer whale) or a great white shark?
This is not even a hypothetical.Killer whales have been recorded hunting and eating great white sharks over and over throughout the years all around the globe.Killer whales literally make playthings out of Great Whites, holding them down and slashing their guys to eat their livers, a delicacy some pods of orcas have grown a taste for.Great whites are absolutely helpless against killer whales and run from them if they were fortunate enough to notice them before getting gangraped.A population of great whites was tagged in the Farallon Islands off the coast of San Francisco. All of a sudden, the scientists notice they had all left and disappeared. The answer behind the perplexing riddle only came as they found a shark carcass washed up missing it's liver. A group of transient Orcas had come by and snacked on their livers, so the sharks all got the hell out of there before they became Orca Food.Orcas are literally THE Apex Predator in all the oceans and seas all around the world. They hunt everything that isn't human, from great whites to sperm whales to even the colossal blue whale. The only thing they don't hunt is humans, because they are smart enough to realize that humans are the number one Apex Predator in the world.
Check this out! Anyone know of these usuless facts?
God bless you tired little fingers. I enjoyed them all. I wonder how many people pull out a dollar to look for the owl?
How do whales defend themselves from sharks?
"The primary predators of whales are killer whales, certain species of sharks—like the tiger shark or the great white shark—and the polar bear, which occasionally hunts beluga whales in the Arctic. How do whales defend themselves against these predators?The largest species possess a formidable weapon: their tail. A humpback whale or a sperm whale can injure or frighten off a predator with a violent thump of its tail. The larger dolphins can also frighten, injure or even kill a shark with a violent head butt.Certain species of whales that are able to dive very deep, such as sperm whales and beaked whales, may take refuge in the depths when attacked by killer whales that are unable to follow them.It is also believed that the migration of humpback whales towards tropical waters at calving time may be a strategy to reduce the risk of their offspring being killed by killer whales. Killer whales, which are present in all of the world´s oceans, are more numerous in temperate and polar waters where seals and sea lions abound. One of the reasons several whale species live in groups is to reduce the risks of predation. Essentially, during an attack, an animal living in a group is less likely to be killed by a predator than if it is on its own. This is known as the “dilution” effect. Also, the chances of spotting a predator are better for a group of whales than they are for an individual whale. Finally, by living in groups, whales are able to develop co-operative strategies to rid themselves of a predator. For example, a few dolphins may pursue a predator in order to scare it off and dissuade it from attacking their group. In another example, pods of sperm whales employ an impressive technique when attacked by killer whales or sharks. They form a circle; heads pointing in, tails pointing out. Each whale will whack its tail as required. Young sperm whales are often out of harm’s way in the centre of the circle. This technique, known as the “marguerite”, is also employed by right whales."