I noticed he wasn't taking a chance of showing his fangs.

She smiled wide enough to show fangs and reached for me again.

The old man showed his fangs in that disturbing smile.

His mouth was wide, showing fangs in the flash of someone's light.

All of them understood the grin that showed his/their fangs.

Instead of showing their fangs, they will run away.

"I wish to be alone," he repeated, this time showing his fangs.

Albertus' smile didn't show fangs, but it might as well have.

He took us in, showing his fangs in a wide smile.

He showed me his fangs in a little grin.