Why are bat fish called a fish?

Batfish are called fish because they are aquatic animals that have gills, fins, and a swim bladder. They are classified as fish because they meet all of the criteria that are used to define a fish.

Here are some of the characteristics of batfish that make them fish:

* Gills: Batfish have gills that they use to extract oxygen from the water.

* Fins: Batfish have fins that they use to swim and maneuver in the water.

* Swim bladder: Batfish have a swim bladder that they use to control their buoyancy in the water.

In addition to these characteristics, batfish also have other features that are typical of fish, such as a streamlined body and a lateral line system that they use to detect movement in the water.

Although batfish have some features that are similar to those of bats, such as their wings and their ability to fly, they are still classified as fish because they meet the criteria that are used to define a fish.