Give one example each for an animal possessing placoid scales and that with cycloid scales.

Explanation

To answer the question about providing examples of animals possessing placoid scales and cycloid scales, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Scales**:
- There are two main types of scales mentioned: placoid scales and cycloid scales.
- Placoid scales are hard, microscopic, and covered with enamel, while cycloid scales are large, flexible, and made of collagen fibers.

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