Bioluminiscent chordate is :-

Options

A. Pyrosoma
B. Doliolum
C. SaJpa
D. BotrylJus

Answer

To solve the question "Bioluminescent chordate is:", we will analyze the options provided and determine which one is known for its bioluminescent properties.

### Step-by-Step Solution:

1. **Understanding Bioluminescence**:
- Bioluminescence is the ability of living organisms to produce light. This phenomenon is commonly found in various marine organisms.

2. **Analyzing the Options**:
- The options given are:
- A) Pyrosoma
- B) Doleolum
- C) Celpa
- D) Botulis

3. **Identifying the Bioluminescent Chordate**:
- Among the options, we need to identify which organism is a chordate and exhibits bioluminescence.
- Pyrosoma is a type of tunicate, which is a marine organism belonging to the phylum Chordata. Tunicates are known for their colonial living structures and bioluminescent properties.

4. **Confirming the Characteristics of Pyrosoma**:
- Pyrosoma forms cylindrical or conical colonies and is known to emit a pale blue-green light, which is characteristic of bioluminescent organisms.

5. **Conclusion**:
- Based on the analysis, the bioluminescent chordate from the options provided is **A) Pyrosoma**.

### Final Answer:
The bioluminescent chordate is **A) Pyrosoma**.

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