Is there a difference between a fish and a tail?

There is no difference; a fish is a verbal term, and a fish is a written term, more formal, because the measure word for fish is tail. But now it seems that there is no difference between the two, except that the expression one-tailed fish is rarely used. A fish is more colloquial, and a tail of fish is usually used in articles.

Tail is used more often in works of art, the dictionary interpretation of "tail" is equivalent to "head", "strip", counting the number of heads of fish, such as: two fish, nine fish. The explanation of "tail" is that it is equivalent to "head" or "strip". There are also said to be because the fish fry is too small, in the fish hatchery, a scoop of tens of thousands of fry, fry piled up together to swim desperately, only to see the tail of the fish do not see the head of the fish, so it is called a tail of fish.

Expanded Information

Classification of Measure Words

1. Measure words that represent a person: one, bit, bar. Among them, "bit" is a more formal and polite use, "article" has a limited use. For example: a person, an adult, a good man.

2. Quantifiers for animals: only, pi, head, strip, peak. For example: a dog, a bird, a sheep.

3, the human and animal organ parts of the quantifiers: a, only, a, root, Zhang, piece, strip, in addition to "a" and "only" other than most of the shape. For example: a brain, a head, a hair