The Megalodon, an extinct shark, was a frequent predator of baleen whales. Whale bones have been found with tooth marks, indicating that megalodon regularly attacked baleen whales. Healthy whale calves are unlikely to be attacked by sharks. However, abandoned calves are vulnerable to shark attacks. Therefore, there is no proof that blue whales eat sharks.

Predators of blue whales

Some scientists believe that orcas eating blue whales is the largest predation event on earth. It’s not known exactly what these predators eat, but they are thought to feed mostly on krill and small fishes. This fact is important for blue whale conservation efforts, because it could mean that the whales are thriving. Alternatively, they may be a sign that the population is growing.

Blue whales can grow to 110 feet, but the one attacked by orcas is only 70 feet long. The team who photographed the blue whale before it was attacked figured it was an adult pygmy blue whale. The smaller subspecies grow to a maximum length of 79 feet. Those attacked by orcas are typically smaller than orcas, so their victims have less to lose. It’s also important to remember that orcas are not the only predators of sharks.

Food sources of blue whales

There are several theories about the food sources of blue whales. Scientists have argued that the whales’ declining numbers are due to human activities. The blue whale population has declined in certain areas, including the Gulf of Alaska and the Aleutian Islands. The species is also declining in the eastern North Pacific as a whole. Some scientists say this is due to the emergence of the invasive killer whales, Megaptera novaeanglia.

The blue whale is the largest animal on Earth, weighing up to 150 tons. Its diet is based on krill. Approximately three to four tonnes of krill are consumed by a 150-tonne whale every day. That is equivalent to six million individual krill. Blue whales feed almost continuously during times when food is abundant, feeding for about eight months of the year. During the winter months, the whales fast.

Food sources of humpback whales

Humpback whales are giant creatures living in the ocean. Named after the humps on their backs, they can grow to 50 feet long and weigh anywhere from 40 to 100 tons. This huge size requires a large amount of energy to maintain their body weight and propel themselves through the water. The biggest food sources of humpback whales are small fish, such as menhaden and herring. They also feed on krill, a type of zooplanka that is crucial to their diet.

Humpback whales feed on plankton, krill, and small fish. They consume large quantities of ocean water during the feeding season and can go months without eating. During the winter, they return to their feeding grounds to store fat reserves and prepare for the next mating season. But despite their size, they still face threats from fishing gear and underwater noise. These animals are listed as endangered due to their declining population.

Food sources of killer whales

While the adult size of a killer whale is about three-four thousand pounds, its food needs are even greater. This marine mammal eats between forty-five and one hundred kilograms a day. The amount of food depends on the type of prey they eat and the abundance of food in their habitat. Because of the lack of food, the number of wild killer whale populations is in decline. This is because adult killer whales require about two percent of their body weight in fish per day to sustain themselves.

Although killer whales are classified as a single species around the world, their diets are extremely diverse. Some are known to feed on elasmobranchs, while others hunt krill and squid. In addition to these meaty staples, killer whales also eat other kinds of animals. Fortunately, their food sources vary based on their habitat, but some regions have killer whale populations that specialize in different types of prey.