A. Measure the fineness ratio.
The fineness ratio is a measure of how streamlined a body is. Streamlined bodies have low drag. Drag is the force that slows the body down. The fineness ratio equals the length divided by the maximum diameter. The best value is near 4.5.

Fineness ratio = Length / Diameter

Here is the big squid! You could see the spaces where the water jets out!

B. Our questions:

1. When your animal moves forward which parts move?

2. When an animal moves forward which parts push?
How do these parts push the animal forward?
How do these parts push the animal upward?

3. When an animal moves what slows down its movement?
Describe how parts of the animal may slow it down less because of their shape or form.