Orca.
Antarctic type A killer whales feed on cetaceans and even blue whales, while pelagic type killer whales feed on sharks and are the undisputed kings of the seas. It can reach 8 to 10 meters in length and weighs around 9 tonnes. The head is slightly rounded and has a discreet beak. The dorsal fin is tall and straight, with a curved length of 1 meter.
The two wing bones are far apart. The temporal fossa is large. The mandible is relatively short. There are 10 to 12 conical teeth in each dentition of the upper and lower jaws. The mouth is long and thin, the teeth are sharp, the temperament is fierce, and it is good at attacking prey.
Detailed information
1. Killer Whale Hunting:
Killer whale food includes fish, other whales, fins, and species. , sea otters, birds, reptiles and cephalopods. Of the 362 killer whale stomachs collected in Antarctica, 217 contained fish, 75 the remains of minke whales, 35 pinnipeds and 35 cephalopods.
Orcas have highly developed brains and powerful bodies. With these advantages, these highly intelligent animals can hunt and kill many large predators in the ocean. Some members of the killer whale family have at least nine shark specialties on their menu, including great whites and makos which are feared by many animals.
Orca expert Dr Ingrid Wiesal, who has studied orca behavior for 17 years, said: "The most impressive strategy is doing karate palm lunges." Killer whales use their tails to chase sharks from the water. without even making physical contact with the sharks. Thanks to the lift generated by their tail, they are able to create a vortex that places the shark above the neckrant created during its movement. Once the prey emerges from the water, the killer whale turns its body and sticks its tail out of the water, then hits the shark like a karate chop. ?
2. Food for Blue Whales:
Blue whales feed on plankton and their staple food is krill. A blue whale consumes 2 to 5 tons of food every day. Swimming speed is 2 to 6 kilometers/hour when feeding, 5 to 33 kilometers/hour during migration and maximum speed is 20 to 48 kilometers/hour when chased. Typically, 10 to 20 short dives are followed by a deep dive. The interval between shallow dives is 12 to 20 seconds, and the deep dive can last 10 to 30 minutes. The spray mist column is narrow and straight, 6 to 12 m high. Krill is the main food of blue whales. The plankton on which blue whales feed belongs to differenterent species in different ocean areas.
In the North Atlantic, northern krill are the main food of blue whales. In Antarctica, Antarctic krill are the main food of blue whales. Blue whales generally feed on the densest schools of krill they can find, which means they must feed in deep water (more than 100 meters) during the day and on the surface at night.
The diving time of a blue whale during the feeding process is generally 10 minutes. 20-minute dives are not uncommon; the longest dive recorded was 36 minutes (Sears, 1998). During the hunting process, the blue whale swallows a large group of krill and a large amount of sea water at the same time. Then squeeze the abdominal cavity and tongue to squeeze the sea water out through the baleen. Once the seawater is emptied from its mouth, the blue whale swallowsthe remaining krill that cannot pass through the baleen.
Baidu Encyclopedia - Blue Whale (marine mammal)
Baidu Encyclopedia - Killer Whale