A fish fin trail made by a fish accelerating rapidly, gradually relaxing its acceleration, and finally coasting (see arrow). From the Steven C. Minkin Paleozoic Footprint Site in Walker County, Alabama. Scale in centimeters.
Fish Fin Trail
![](https://bunny-wp-pullzone-5vqgtgkbhi.b-cdn.net/wp-content/uploads/2023/02/m-3890.jpg)
Courtesy of Alabama Paleontological Society
![](https://bunny-wp-pullzone-5vqgtgkbhi.b-cdn.net/wp-content/uploads/2023/02/m-3890.jpg)