Which is the largest species of cetaceans? 5

Blue whales, also known as "razor whales", are the largest and heaviest animals on Earth, belonging to the mammals, cetaceans, and carp cetaeas. It is widely distributed and can be found in oceans from the Arctic to the Antarctic. The blue whale has a slender body and a blue-gray back, although it can sometimes be lighter in the water.

At least three subspecies of blue whales are known to exist: b. b., which lives in the North Atlantic and North Pacific m.

musculus；B. inhabiting the Southern Ocean m.Intermedia with the Indian Ocean and the South Pacific B

m.brevicauda (also known as pygmy blue whale). B. found in the Indian Ocean

m.Indica may be another subspecies. Like other baleen whales, blue whales feed mainly on small crustaceans (such as krill) and small fish, sometimes including squid.

The blue whale (scientific name: balaenoptera musculus) is a marine mammal belonging to the suborder Baleen Whales. The blue whale is believed to be the largest animal ever to live on Earth, reaching a length of up to 33 meters and weighing up to 160 tons.

The largest of the cetaceans, the blue whale, had fewer than 50 remaining of nearly 360,000 killed in the 20th century. Whales are found in all oceans of the world.

1. One is baleen whales, with 11 species in their mouths; Although there are few species of baleen whales, they are all very large, and the smallest species are more than 6 meters long. Among them, the largest is the blue whale, an adult blue whale can reach 30 meters in length and weigh 180 tons; Despite its size, it feeds on the very small Antarctic krill and other small fish and shrimp.

2. One is the toothed whale, which has teeth in the mouth and has no beard. There are more than 70 species of toothed whales, ranging in length from 1 meter to 30 meters. Sperm whales, killer whales, dolphins, porpoises are all toothed cetaceans, and they are all carnivorous and feed on fish, invertebrates, and other mammals.

The Wajita whale is the smallest whale in adult size, with an average adult length: male centimeters, female centimeters. Adult weight kilograms.

Newborn pups grow rice. The "Wajita" lives in Mexico, and many calves are trapped in the water because the locals often cast nets into the water to kill fish and shrimp, which endangers the lives of many calves.

It inhabits the sea at a depth of 11 to 50 m and 11 to 25 km from the shore, with silt and clay at the bottom. In particular, it prefers muddy water, which is highly nutritious.

The only species of porpoise that lives in warm waters, it can adapt to large annual temperature fluctuations, suitable for water temperatures of 14 36 (temperature range in the Gulf of California). There are only 250 to 400 left in the world.

Scientists have found that the world's smallest whale, Wajita, is in a very difficult living environment, and if it is not saved, this species of whale will face extinction.

Whales are broadly divided into two main groups: baleen cetaceans and toothed cetaceans.

1.Toothed cetaceans: toothed sea giants such as: sperm whales, orcas, dolphins, porpoises.

2.Baleen cetaceans: Whiskered whales. In fact, these whiskers are chamfered teeth that grow inside the mouth and are used to filter water and catch shrimp and other small animals that whales eat, and these teeth replace the teeth.

Whales are viviparous mammals, not fish. Calves need to be fed breast milk for a year to mature. Fish, on the other hand, are oviparous vertebrates.

Broodstock generally do not have the habit of taking care of small fish. The "fins" of whales actually evolved from their limbs. Fish are not.

Whales breathe with their lungs. Fish breathe with gills. Whales are homeotherms, whereas fish are ectotherms.

It is not possible to distinguish a whale from a fish by the presence or absence of scales. Because many fish also do not have scales.

fin whales, blue whales, humpback whales, gray whales, etc.; Toothed cetaceans, toothed, without baleen and with one nostril, like sperm whales, narwhals, killer whales, etc.

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