Members of Cephalochordata are

Options

A. carnivorous
B. filter feeders
C. mucous feeders
D. predators

Answer

### Step-by-Step Solution:

1. **Understanding Cephalochordata**:
- Members of the phylum Cephalochordata are known as chordates because they possess a notochord, which is a flexible rod-like structure that provides support.

2. **Etymology of Cephalochordata**:
- The term "Cephalochordata" derives from "cephalo," meaning head, and "chordata," referring to the notochord. This indicates that the notochord extends into the head region of these organisms.

3. **Habitat**:
- Cephalochordates are primarily marine organisms, meaning they inhabit oceanic environments.

4. **Examples**:
- A well-known example of cephalochordates is the lancelets, which are small, fish-like marine animals.

5. **Feeding Mechanism**:
- The question asks about the feeding habits of cephalochordates. They are classified as filter feeders.

6. **Filter Feeding Explained**:
- Filter feeders are organisms that strain food particles from the water. They use specialized structures to filter out organic matter and food particles, which are then consumed.

7. **Conclusion**:
- Therefore, the correct answer is that members of Cephalochordata are filter feeders.