Which fin helps a fish turn balance and brake?

Here's why:

* Turning: By moving the caudal fin from side to side, a fish can create a force that propels it in the desired direction.

* Balancing: The caudal fin acts like a rudder, helping the fish maintain its upright position and prevent rolling.

* Braking: By quickly moving the caudal fin in the opposite direction of its movement, the fish can slow down or stop completely.

While the caudal fin is crucial for these functions, other fins also play a role:

* Pectoral fins: These fins near the head help with maneuvering and stopping, especially at slow speeds.

* Pelvic fins: These fins, found under the body, can help with stability and turning.

* Dorsal fin and Anal fin: These fins provide stability and prevent rolling, especially when the fish is swimming upright.

So, while the caudal fin is the primary actor, all the fins work together to help a fish move and control its body in the water.