Is dolphin a mammal?

Dolphins are large carnivores, at the top of the food chain. Except for the more ferocious sharks, other marine organisms pose no threat to them, mainly living in warm tropical waters, but some, such as ridged dolphins, prefer cold waters and usually live in shallow water or at least stay near the sea. Let's take a look at whether dolphins are mammals.

Is dolphin a mammal?

Dolphins are aquatic mammals closely related to whales and porpoises, evolved in the Miocene about 10 million years ago, widely live in shallow seas near the continental shelf, occasionally found in fresh water, and feed mainly on fish and molluscs. All kinds of dolphins constitute the family Dolphinidae, which is the family with the most species of marine mammals. There are 37 species belonging to 17 genera in the world and 18 species belonging to 13 genera in China. Dolphins have a seemingly friendly form and playful character, and have always been very popular in human culture.

What kind of food do dolphins eat?

Dolphins feed mainly on fish and squid, and killer whales also prey on mammals (such as whales and flippers) as well as birds and large fish. Like other toothed whales, dolphins rely on echolocation for prey and can even stun their prey with loud blows. Some dolphins are highly social species that live in large groups (sometimes more than 100000 individuals) and exhibit many interesting collective behaviors. There are many ways for members of the group to cooperate. One example is that dolphins in the group sometimes attack sharks, killing them through impact, and members also cooperate to save injured or sick individuals.

Where are the puffer fish distributed?

1. Amazon puffer fish: Amazon puffer fish, also known as Amazon freshwater fish, pink puffer fish, pink freshwater fish, etc., is the largest freshwater fish peculiar to the Amazon and Orinoco River.

2. Baiji dolphin: Baiji dolphin, also known as Baiji whale, white fin, Yangtze River puffer fish, etc., freshwater whales endemic to China, only found in the middle and lower reaches of the Yangtze River, national first-class wild animals, one of the 12 most endangered animals in the world.

3. The Ganges dolphin: the Ganges dolphin is a freshwater dolphin living in India, Bangladesh, Nepal and Pakistan. It is divided into Indus subspecies and Ganges subspecies. There are only about 2000 to 6000 animals left worldwide.

4. Plata puffer fish: Plata puffer fish is the only species that lives in rivers, also known as puffer fish, Labrador puffer fish, etc. they are freshwater fish living in the ocean, distributed in southeastern South America and the Atlantic Ocean.