Squid, cuttlefish and octopus belong to the class

Options

A. Decapoda
B. Scaphopoda
C. Cephalopoda
D. Apoda

Answer

To determine the class to which squid, cuttlefish, and octopus belong, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organisms**: First, we need to recognize that squid, cuttlefish, and octopus are marine animals that are commonly grouped together due to their similarities.

2. **Determine the Phylum**: These animals belong to the phylum Mollusca. Mollusca is a diverse group that includes various classes of animals, including those with shells and those without.

3. **Examine the Options**: The options provided are:
- A) Dicapoda
- B) Scaphopoda
- C) Cephalopoda
- D) Apoda

4. **Analyze Each Option**:
- **Dicapoda**: This is not a correct option as it refers to a class of crustaceans, which are part of the phylum Arthropoda.
- **Scaphopoda**: This class includes tusk shells, which are not related to squid, cuttlefish, or octopus.
- **Cephalopoda**: This class includes squid, cuttlefish, and octopus. Cephalopods are known for their advanced nervous systems, ability to change color, and reduced or absent shells.
- **Apoda**: This class refers to limbless organisms, primarily amphibians, and is not related to the animals in question.

5. **Conclusion**: Based on the analysis, the correct class for squid, cuttlefish, and octopus is **Cephalopoda**.

### Final Answer:
**Cephalopoda**