Which of the following is not true with reference tf fish products?

Options

A. Fish meal is rich source of protein for cattle and poultry
B. Fish meal is produced from the non-edible parts of fishes
C. Silver revolution is increases in fish production
D. Shagreen is the skin of shark

Answer

To determine which statement is not true with reference to fish products, we will analyze each option provided in the question step by step.

### Step-by-Step Solution:

1. **Understanding Fish Meal**:
- The first statement claims that fish meal is a rich source of protein for cattle as well as poultry.
- Fish meal is indeed made from fish or fish waste and is known for its high protein content, making it beneficial for various animals including cattle and poultry.
- **Conclusion**: This statement is true.

2. **Production of Fish Meal**:
- The second statement states that fish meal is produced from non-edible parts of the fish.
- Fish meal can be made from unprocessed fish waste, which includes parts of the fish that are not typically consumed by humans.
- **Conclusion**: This statement is also true.

3. **Silver Revolution**:
- The third statement mentions that the silver revolution is an increase in fish production.
- However, the silver revolution is actually associated with the increased production of eggs, not fish.
- **Conclusion**: This statement is false.

4. **Chagrin**:
- The fourth statement refers to chagrin, which is the skin of sharks and rays, used for various purposes including polishing and covering items.
- This statement is correct as chagrin does come from these fish and has practical applications.
- **Conclusion**: This statement is true.

### Final Answer:
- The statement that is **not true** with reference to fish products is the third statement: "The silver revolution is an increase in fish production."