Besides humans, the blue whale's enemies are killer whales and large sharks. Adult blue whales are much larger than any individual killer whale or shark, so these animals tend to attack calves. Few creatures are capable of subduing a healthy adult blue whale, which is the largest creature on earth. Blue whales feed mainly on krill.Continue Reading
Since blue whale calves stay close by their mothers, the strategy of the killer whale pod is to harass the mother and calf until they are exhausted. The killer whales then isolate the calf and prevent it from surfacing to breathe until the calf drowns. However, there have been cases in which adult blue whales have been badly injured by killer whale attacks. The killer whales can chase a blue whale for hours, surround it and even leap onto its back to defeat it. All the while, the members of the pod bite chunks out of the whale to weaken it.
A great white shark might approach a blue whale calf from behind or below to avoid detection. Very large sharks that are13 feet or longer tend to target marine mammals, such as blue whales, because of the nutrition to be had from their blubber.Learn more about Marine Mammals
Depending upon the species, a whale's stomach can be enormous, holding up to 2,200 pounds of food in the case of the blue whale. This whale's main diet consists of krill and copepods filtered through stiff, comb-like teeth called baleen plates.Full Answer >
Bottlenose dolphins are occasionally preyed upon by large sharks and killer whales. They are common members of the family Delphinidae, or oceanic dolphins, and live worldwide in tropical and temperate waters. Two species of bottlenose dolphin exist: the common bottlenose dolphin and the Indo-Pacific bottlenose dolphin.Full Answer >
Although rare, sharks have been known to attack and kill dolphins, while there has also been evidence of killer whales eating dolphins, says the National Aquarium, a website run by Bio Expedition. Since dolphins are on the top of the food chain, few animals are considered as their enemies.Full Answer >
Although dolphins are apex predators, they are sometimes eaten by sharks and killer whales; however, their primary predator is mankind. Dolphin pods attack sharks on sight, circling protectively around the weakest member of their group and attacking until the shark is driven away or killed. Dolphin remains have also been found in orca stomachs. Humans kill dolphins either by accident or intentionally during large-scale fishing operations.Full Answer >