Most animals that hunt or defend themselves with projectiles use liquids, from vomit to venom. But some attack with solid weapons, such as a tarantula's barbed hairs. Porcupines aren't on the list of sharpshooters because they can't actually shoot their quills—that's just a popular myth.
Key Facts In This Video
The archer fish makes a "gun barrel" in its mouth by pressing its tongue against a specialized groove. (0:19)
Archer fish adjust their aim to account for how light bends at the water's surface. (1:08)
The velvet worm shoots its threads of glue up to 1 meter to ensnare prey. (2:29)