What shared trait, beyond inflation, binds many species within the Tetraodontidae family?

Answer

Possession of powerful, beak-like mouths for crushing food

A key element shared across many species in the Tetraodontidae group is their structure for eating, possessing beak-like mouths suitable for crushing hard-shelled prey.

What shared trait, beyond inflation, binds many species within the Tetraodontidae family?
classificationfishgrouppufferfish