Tube feet occur in

Options

A. Cuttlefish
B. Devil fish
C. Catfish
D. Star fish

Answer

To determine where tube feet occur, we need to analyze the options provided and understand what tube feet are and in which organisms they can be found.

### Step-by-Step Solution:

1. **Understanding Tube Feet**:
- Tube feet are small, elongated structures found in certain marine animals. They are primarily associated with the echinoderms, which include starfish, sea urchins, and sea cucumbers.
- These structures are part of the water vascular system and are used for locomotion, feeding, and respiration.

2. **Analyzing the Options**:
- **Cuttlefish**: This organism belongs to the phylum Mollusca, specifically the class Cephalopoda. Cuttlefish do not have tube feet.
- **Devilfish**: This is another name for certain types of cephalopods (like the octopus), which also belong to the phylum Mollusca. They do not possess tube feet.
- **Catfish**: Catfish are part of the phylum Chordata, specifically the class Actinopterygii (ray-finned fishes). They do not have tube feet.
- **Starfish**: Starfish are echinoderms, belonging to the phylum Echinodermata. They are well-known for having tube feet, which are used for movement and feeding.

3. **Identifying the Correct Answer**:
- Since tube feet are characteristic of echinoderms and specifically found in starfish, the correct answer to the question is **starfish**.

### Conclusion:
The organism in which tube feet occur is **starfish** (option D).

---