what do fish use their dorsal fin for

The dorsal fin, located on the top of a fish’s back, has two main functions:

Stability: The primary role of the dorsal fin is to help fish maintain balance while swimming. It acts like a keel on a boat, preventing the fish from rolling over. This is especially important when making quick turns or changes in direction.

Maneuvering: The dorsal fin also aids fish in maneuvering and maneuvering. By adjusting the tilt and angle of the fin, fish can control their movement more precisely. This is helpful for tasks like braking, stopping suddenly, or changing direction quickly.