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.Know More
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
The main predators that eat sea otters are sharks and killer whales. Eagles, bears, coyotes and Steller sea lions are also known to eat sea otters occasionally.Full Answer >
Generally, killer whales will not eat polar bears, but because they can be opportunistic eaters, if a polar bear presents itself as food the whale may eat it. However, the two animals typically leave each other alone.Full Answer >
Forty species of dolphins live in varied climates, from the arctic, which is inhabited by killer whales, to the Caribbean, which is preferred by bottlenose dolphins. Even the Amazon River basin is home to several dolphins, including the endangered finless porpoise, according to Whale Facts.Full Answer >
Leopard seals frequently grow up to 12 feet long and weigh up to 1300 pounds, with only one predator to fear: killer whales. There are anecdotal accounts of sharks hunting leopard seals, but there are no records of this happening on a regular basis.Full Answer >