9 species carry Strong Jaw as a normal ability

Effect, in PokéAPI's words

“Strengthens biting moves to 1.5× their power.”

As a normal ability

Species	Slot	Note
Tyrunt	Normal
Tyrantrum	Normal
Yungoos	Normal
Gumshoos	Normal
Bruxish	Normal
Chewtle	Normal
Drednaw	Normal
Boltund	Normal
Dracovish	Normal

Elsewhere in PokéAPI

4 more holders without a page here

Alternate forms and other species that PokéAPI lists with Strong Jaw.

Sharpedo Mega, Gumshoos Totem, Drednaw Gmax, Avalugg Hisui