Shell fish does not include

Options

A. prawn
B. crab
C. oysters
D. fishes

Answer

**Step-by-Step Solution:**

1. **Understand the Definition of Shellfish**: Shellfish is a term used to describe aquatic invertebrates that have exoskeletons. They are commonly consumed as food and include various groups such as mollusks and crustaceans.

2. **Identify the Groups of Shellfish**: Shellfish can be classified into three main groups:
- **Mollusks**: This group includes animals like oysters and clams.
- **Crustaceans**: This group includes animals like prawns and crabs.
- **Echinoderms**: This group includes sea urchins and starfish.

3. **Analyze the Options Provided**: The question provides four options:
- Prawn
- Crab
- Oysters
- Fishes

4. **Categorize Each Option**:
- **Prawn**: This is a crustacean and thus a type of shellfish.
- **Crab**: This is also a crustacean and a type of shellfish.
- **Oysters**: This is a mollusk and therefore a type of shellfish.
- **Fishes**: Fishes are vertebrates and do not fall under the category of shellfish.

5. **Determine the Correct Answer**: Since shellfish includes invertebrates like crustaceans and mollusks, the option that does not belong to this category is "fishes."

6. **Final Answer**: The correct answer is **fishes**.

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