Why do osteoglossomorphs have teeth on their tongues?

Osteoglossomorphs are unique among fishes because they utilize their tongues as an opposing surface for their teeth when biting into food. Rather than relying solely on jaw-based biting, these fish use the teeth located on their tongues to grasp, hold, or process their prey against the roof of the mouth or other oral structures. This specialized anatomical arrangement is a defining characteristic of the superorder Osteoglossomorpha, which is widely considered to be the most primitive group of bony fishes.12