Here's why:
* "Minnow" is a common name: It doesn't refer to a specific species. Many different types of fish are called minnows.
* Many species: There are hundreds of species of fish that fall under the "minnow" category.
* Size: Minnows can vary in size, some being very small and others growing to a significant size.
* Lifecycle: Like all fish, minnows have a life cycle that includes eggs, larvae, juveniles, and adults. Some fish are called minnows throughout their life, while others are only called minnows during their juvenile stage.
For example:
* The Fathead Minnow is a species of fish that remains small throughout its life and is always called a minnow.
* The Common Carp, which can grow to be very large, is often called a minnow in its juvenile stage.
So, when someone says "minnow," they're generally referring to a small, freshwater fish, but it's important to understand that this term encompasses many different species and life stages.