Dolphin pinyin: hǎi tún.

Dolphin is a collective name for a group of aquatic mammals in the family Delphinidae, small or medium-sized toothed whales, widely living in the world's oceans, in the Inland Sea and rivers near the mouth of the salty and fresh water is also distributed, and individual species are found in inland rivers. Usually like to live in groups, prey on fish, squid and so on. The dolphin's trunk is spindle-shaped, smooth and hairless skin, athletic and flexible body, good at jumping and diving, is the most rapid action in the water mammals.

Dolphins have a well-developed sonar system, activities rely mainly on echolocation function, in the water and in the air have excellent hearing. The nostrils are on the top of the head and are used to get out of the water for air. They have complex brain grooves, good memory, can learn many actions under human training, is one of the highest IQ animal family, has a gentle and friendly, lively and active character, by the people around the world generally loved.

Word by word

Hai hǎi (ㄞˇ)

1, near the continent, smaller than the ocean waters: the ocean. The sea. The sea elevation. Sea border. The sea. The coast. The sea. The five lakes and the four corners of the world.

2. Used in lake names: Qinghai. Zhongnanhai.

3. A vessel of large capacity, huge: Hai Bowl. Haihan (a term of respect, calling the other person generous and tolerant). Boast about the sea.

4, a metaphor for a large number of people and things like the sea: people mountain and people sea. The sea of fire.

5, aimlessly: sea curses. Sea looking.

6. An ancient reference to coming from a foreign country: haibun.

7, referring specifically to Shanghai, China: haipai.

8, surname.

豚tún（ㄊㄨㄣˊ）

⒈ ? The guinea pig is a mammal, also known as the "Dutch pig" or "guinea pig".

Peake ? Piglet, also referred to pigs in general: guinea pig shoulder. Dolphin hooves. Dolphin (modestly called his son).