Give two differences between a shark and a ray.

Explanation

### Step-by-Step Solution:

1. **Identify the Group**: Both sharks and rays belong to the class Chondrichthyes, which means they are cartilaginous fish. This is a similarity rather than a difference.

2. **Body Shape**:
- **Shark**: Sharks have a laterally compressed body. This means that their bodies are flattened from side to side, giving them a streamlined shape that is ideal for swimming.
- **Ray**: Rays have a dorsoventrally flattened body. This means that their bodies are flattened from top to bottom, which allows them to glide along the ocean floor.

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