What would cause a beta fins to be all torn up?

* Fin rot: Fin rot is a bacterial infection that can cause the fins to become torn and frayed.

* Fin nipping: Fin nipping is a behavior where fish bite each other's fins. This can be caused by stress, overcrowding, or boredom.

* Physical injury: Physical injuries to the fins can be caused by sharp objects in the tank, such as driftwood or rocks.

* Tumors: Tumors can grow on the fins and cause them to become torn and frayed.

* Cancer: Cancer can also cause the fins to become torn and frayed.