Which of the following algae secrete "Saxitoxins" :-

Options

A. Gonyaulax
B. Oscillatoria
C. Noctiluca
D. Pyrocystis

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks which type of algae secretes "Saxitoxins".

2. **Understand the Options**: The options provided are:
- Corneologus
- Oscillatoria
- Noctiluca
- Pyrocystis

3. **Analyze Each Option**:
- **Corneologus**: This is a type of dinoflagellate. Dinoflagellates are known to secrete neurotoxins, specifically Saxitoxins. These toxins can cause serious health issues, such as Paralytic Shellfish Poisoning (PSP) when consumed by humans through contaminated shellfish.

- **Oscillatoria**: This organism belongs to the class of Cyanobacteria, not dinoflagellates. It does not secrete Saxitoxins, making this option incorrect.

- **Noctiluca**: Although Noctiluca is a dinoflagellate, it does not secrete Saxitoxins. Some characteristics of Noctiluca resemble protozoans, and they do not produce the neurotoxins associated with Saxitoxins.

- **Pyrocystis**: This is another genus of dinoflagellates, but it also does not secrete Saxitoxins. Therefore, this option is incorrect as well.

4. **Conclusion**: After analyzing all the options, the only algae that secretes Saxitoxins is **Corneologus**.

**Final Answer**: The algae that secretes Saxitoxins is **Corneologus**.

---