The respiratory pigment present in chordates is______.

Explanation

**Step-by-Step Solution:**

1. **Identify the Group of Organisms**: The question asks about the respiratory pigment present in chordates. Chordates are a diverse group of animals that include mammals, birds, reptiles, amphibians, and fish.

2. **Understand the Role of Respiratory Pigments**: Respiratory pigments are molecules that transport oxygen in the blood. They are crucial for the respiratory process, allowing organisms to efficiently absorb and transport oxygen to tissues.

3. **Recognize Common Respiratory Pigments**: The most common respiratory pigments found in animals include hemoglobin and myoglobin. Hemoglobin is primarily found in red blood cells and is responsible for oxygen transport in the bloodstream.

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