The difference between puffer fish and dolphin

Puffer fish is a general term for mammals of the freshwater dolphin family of cetaceans. It is the most affectionate mammal among mammals. Dolphins are aquatic mammals closely related to whales and porpoises. They evolved in the Miocene about 10 million years ago. They widely live in shallow seas near the continental shelf, occasionally in fresh water. Let's take a look at the differences between puffer fish and dolphins.

The family and genus difference between puffer fish and dolphin

1. Puffer fish: puffer fish is the general name of mammals of the family Freshwater dolphins of the suborder Cetacea, suborder Cetacea, subphylum Vertebrata, subphylum Chordata, subphylum Vertebrata.

2. Dolphins: dolphins are mammals of the subphylum Vertebrate, subphylum Chordata, subphylum Vertebrata, Class Mammalia, subclass true mammals, Cetacea, suborder Cetacea and Dolphinidae.

The morphological difference between puffer fish and dolphin

1. Puffer fish: the puffer fish is larger than the dolphin and can grow up to 3 meters long. unlike the dolphin, the head can rotate 90 degrees, which gives it an advantage in complex rivers. Sometimes, like dolphins, they chase schools of fish together to improve predation efficiency. There is sensitive hair on the jaws, which is said to be the tactile organ that preys on crustaceans in the mud. They have wide pectoral fins, which increases their flexibility in narrow rivers, and the speed of their caudal fins can reach 23 km / h in a short time.

2. Dolphins: dolphins are about 1.5 to 10 meters long and weigh 50 to 7000 kilograms. Females are usually larger than males, and most dolphins have remarkable head features. Due to the presence of lenticular fat, the beak and forehead is raised, also known as "forehead". Such structures help to gather echolocation and foraging sounds. Some dolphins have a long forehead, but their beaks are short, and their raised foreheads only show a square appearance. Most dolphins are sleek and smooth, with hooked dorsal fins (there are other forms as well).

Distribution difference between puffer fish and dolphin

1. Puffer fish: the freshwater fish family has four existing species that inhabit freshwater rivers and estuaries, of which three live in the Tanshui River, while the other species Plata puffer fish (La puffer fish) lives in the saltwater estuary and inshore oceans. However, in the scientific classification, it is still included in the freshwater fish family rather than the dolphin family.

2. Dolphins: dolphins are widely distributed and have many species in all the sea areas of the world, especially in the tropical coastal areas, and some freshwater rivers are also found.

The difference of protection between puffer fish and dolphin

1. Puffer fish: Baiji is a freshwater cetacean endemic to China, only found in the middle and lower reaches of the Yangtze River. It is listed as a national first-class wild protected animal and one of the 12 most endangered animals in the world. On August 8, 2007, the Royal Society Biological letterhead published a report officially announcing the functional extinction of Baiji dolphin.

2. Dolphins: on December 10, 1988, all genera and species of Dolphinidae were listed in China's National key protected Wildlife list, of which the Chinese White Dolphin is a national first-class protected animal, and the other dolphins are national second-class protected animals.