What kind of dolphins are these? 5

Categories: Jiaoshan Zhengyu Science >> Science and Technology.

Analysis: Species of dolphins.

Dolphins - small cetaceans.

Whale dolphins are small, toothed whales with more than 30 species. There is also a dolphin-like calf that is often mistaken for a dolphin, but in fact it is significantly different from a dolphin. The main difference is that dolphins form beaks in their jaws, while dolphins do not have beaks.

Dolphins are usually smaller and stronger, and swim quietly and slowly, unlike dolphins. However, dolphins, dolphin-like dolphins, and pilot and killer whales are all small cetaceans.

Other dolphins.

Dolphins - small cetaceans.

Cetaceans are mammals.

Fish and dolphins always swim in the sea and feel like ordinary fish, but in fact, cetaceans are not hatched from eggs like baby fish, they are the same as humans, or land-based homeothermic animals, they are born after more than ten months of pregnancy in their mother's womb, and like human babies, they must be breastfed by their mothers for several years, and slowly grow up to be independent, and during this period, they have to learn a lot of survival skills.

Cetacean classification. In biology, cetaceans are divided into the suborder baleen whales and the toothed whale suborder, which are classified as baleen whales with thick and dense baleen in their mouths; And the whales under the suborder of toothed whales have neat and sharp teeth in their mouths, among which there is the dolphin family which is what we often call dolphins. Baleen whales are huge baleen whales, which can be used to screen plankton, so they are filter feeders (filtering seawater to eat small fish and shrimp in the water).

Toothed whales are predatory (biting), and the number and arrangement of teeth will vary depending on the feeding habits.

How to tell the difference between a whale and a dolphin.

Generally speaking, we commonly call a whale is a large cetacean, such as killer whales, blue whales, etc., and smaller ones, no more than four meters, we say that it is a dolphin. But that's just a colloquial distinction. Dolphins are actually a type of whale and are small toothed whales.

Powder is magical! The most daring whale in the sea, the killer whale, commonly known as the killer whale, is actually the largest dolphin! )

What is the difference between cetaceans and fish?

1. Cetaceans breathe with their lungs.

Cetaceans are not like fish, they stay in the water all the time and absorb nutrients directly from the water. They breathe on their lungs, so every once in a while, they have to go to the surface to breathe, which is why whales have fumaroles on the top of their heads.

Second, the tail fin of the cetacean is flat.

The easiest thing to distinguish between cetaceans and fish is that their tail fin is held flat and swims up and down, while fish are vertical and swings from side to side.

3. Cetaceans have only one dorsal fin, and some even have none.

Fish, on the other hand, may have more than one fin.

Fourth, the ** smoothness of cetaceans.

The fish's ** is covered with scales.

5. Cetaceans are viviparous, need to be pregnant and breastfeeding, fish are oviparous, have a large yield, and do not need to breastfeed, and cetaceans have only one litter at most every time they give birth, and the birth rate is not high.

There are 17 genera in the dolphin family, namely true dolphins, bottlenose dolphins, right spinal dolphins, camel knees, slendernose knees, rough-toothed dolphins, beak-headed dolphins, gray knees, altar-beaked dolphins, bottle-beaked dolphins, short-nosed dolphins, melon-headed whales, killer whales, pygmy killer whales, pseudokiller whales, pilot whales, and pygmy white sea knees. Each genus contains several species of dolphins. However, there are exceptions, such as the only one species of dolphin found in the genus Altar Beak Dolphin, the Sarawak Dolphin, also known as the Freund's Dolphin.

China's most famous Chinese white dolphin belongs to the genus Camel Dolphin, which is a national first-class key protected wild animal! The bottlenose knees that we often see in aquariums belong to the genus Bottlenose Dolphins. One thing we must be clear about is that melon-headed whales, killer whales, baby killer whales, pseudo-killer whales, and long-limbed pilot whales, which are called "whales" in ordinary life, also belong to the dolphin family!

Among them, the pseudo-killer whale is a national second-class key protected animal in China! Although the porpoise sounds like a dolphin, it is actually an animal of the porpoise family, so it is not a dolphin in the true sense! In general, there are a total of 17 genera in the known dolphin family, which contains more than 30 species, and the whole dolphin family is a united, friendly and joyful family.

Dolphin family du delphininae

Dolphins of the genus Zhi delphinus

True dolphin dao delphis

Dolphins of the genus Stenella

Longirostris

Blue and white fine-nosed dolphin caeruleoalba

White-spotted dolphin attenuata

Spotted barramundi dolphin frontalis

Atlantic honeysnuzzy dolphin plagiodon

Bottlenose dolphins are genus tursiops

Bottlenose dolphin truncatus

Oriental bottlenose dolphin aduncus

Pacific bottlenose dolphin gillii

Altar-beaked dolphins of the genus Lagenodelphis

Huo's dolphin hosei

Bottle-beaked dolphins of the genus Lagenorhync

Dolphins - small cetaceans.

Dolphins are small, toothed whales with more than thirty species. Another species of dolphin-like calf is often mistaken for a dolphin, but in fact it is significantly different from dolphins. The main difference is that dolphins have a beak in their jaws, while dolphins do not have a beak.

Dolphins are usually smaller and stronger, and swim quietly and slowly, unlike dolphins. However, dolphins, dolphin-like dolphins, pilot whales and killer whales are all small cetaceans.

Bottlenose dolphins. Bottlenose dolphins are one of the most well-known species of dolphins and can be found in aquariums, zoos or naval bases. They sometimes train to do all kinds of performances. He has a grayish-black back and a white base, and a stubby beak. Mature dolphins are about eleven or twelve feet long.

Bottlenose dolphins live in groups in the wild and can be found throughout the Atlantic and Pacific Oceans. They will hunt schools of fish and scare them into a bunch so that they can eat the small fish.

Common dolphins. Sailors and travelers sailing in the Mediterranean Sea or other warm waters often see common dolphins. The undertone of the common dolphin is wonderful; The back is black, the bottom is white, the body has gray-brown, black, and yellow stripes on the sides, and the eyes also have black stripes and white edges, and it looks as if he is wearing a mask. He is about eight feet long and is also a social dweller, feeding on squid and fish.

Other dolphins.

White-sided dolphins inhabit the North Atlantic Ocean and are also colored with paint. His back, tail, and flippers are black, white from chin to abdomen, and have long, curved yellow-brown stripes on each side. In addition, he has a yellowish-brown underside.

His close relatives are white-beaked dolphins, who also live in the North Atlantic. These two types of dolphins are about nine feet long.

The dolphin seemed to have hit something so hard that it had sunken its nose. His head is almost square and completely devoid of a beak. He was dark gray, white on the bottom, and many marks.

It can be seen everywhere in the ocean. It is about 12 to 13 feet long. Only the lower jaw has teeth, and most of them feed on squid and squid.

Other dolphins have their own characteristics. Chinese white dolphins are milky white with red fins and black eyes. The name of the gyro dolphin comes from the fact that it has the habit of jumping out of the sea and spinning like a spinning top. Coarse-toothed dolphins have wrinkled teeth that are not as smooth as normal dolphins.

Pilot whales, also known as blackfish, are large dolphins that can grow up to 20 feet long. They are black, sometimes white, and have a rounded forehead that protrudes from the beak. Many species of dolphins, as well as some cetaceans, have this protrusion, called guatum.

Pilot whales inhabit temperate waters in large groups ranging from 50 to 100.

Harbour dolphins are the smallest species of cetaceans, stocky and stocky, only about five feet long. The back is dark brown or gray, the base is white, and the sides are grayish-brown.

1.Spinner dolphins.

The body length is about meters; They usually keep a long distance from the boats in the morning, when they are mostly resting; In the afternoon, you will have a better chance to get close to them, and even lean on the string of the boat to ride the waves, or swim parallel to the boat, which is the best time to shoot.

2.Tropical spotted dolphins.

The body length is about meters; This dolphin likes to swim to the bow of the boat to ride the waves, as long as the boat is at the right speed, it will follow the boat for a long time, and it is a good opportunity to photograph this dolphin.

3.Wright's dolphins.

Body length can reach meters; That is, the pattern dolphin, this kind of dolphin is a large body length among the small cetaceans, and it is generally more tolerant of fishing boats, which means that it is less afraid of boats (the appearance of the old god is there), and it is also the most common species on the east coast, so there are more opportunities to shoot.

4.Baby killer whales.

The curiosity about boats seems to be greater, and although these baby killer whales are called whales, their maximum body length is only one meter, which is not as long as the Rui's dolphin. You'll be wandering around the side of the boat, and the action is abundant, so you have to always seize the moment to avoid missing a wonderful shot!

5.Bottlenose dolphins.

Body length can reach meters; In foreign countries, bottlenose dolphins often go to the bow of the boat to ride the waves, and are the main subject of photography. However, it is not very common for Taiwan's bottlenose dolphins to swim to the bow of the boat to ride the waves, even if there are previous experiences of the bow riding the waves, but the dolphins shuttle at the bow of the boat are extremely fast, unpredictable, and difficult to photograph. 0