Who is the monster slain by Hercules?

Hercules, the legendary hero of Greek mythology, is famously known for slaying the Nemean Lion, one of his Twelve Labors. The lion had an impenetrable hide, making it nearly impossible to kill. Hercules ultimately defeated it by strangling it with his bare hands and later used its own claws to skin it. The Nemean Lion became a symbol of Hercules' strength and bravery.