Snake

"One time in med school, I made the mistake of confiding to my partner in biology class that it had caused my all-time worst nightmares. He actually planted a live snake inside a cadaver I was working on."

- Dr. Jennifer Keller

Snakes are elongate, legless, carnivorous reptiles. Jennifer Keller once had a live snake implanted in a cadavar she was working on at med school by a fellow student.

While under the affect of a Tick-like bug Airman Dunning believed their was a snake under the skin of his arm, which he tried to claw at and ripped the skin from his arm.

Jack O'Neill often refers to Goa'uld as 'snakes' or 'snakehead'.