Blade-Tooth

Tooth Blade is a Quirk possessed by Moonfish.

Description
Moonfish's Quirk allows him to enlarge, shape, and control his teeth to form powerful blades.

The teeth seem to be quite strong, as they were capable of breaking through Shoto Todoroki's ice. They can also help Moonfish at mobility and evasion.

The teeth aren't unbreakable though, and can be destroyed when hit by a strong enough force.