This terrifying creature is called Eunice aphroditois, or simply the Bobbit worm. It can grow up to three meters long and is capable of slicing its larger prey in half. Moreover, it injects a toxin into its prey to make it easier to digest. The worm keeps itself buried in the sand or gravel at the bottom of the sea, only allowing its five tiny antennae to stick up out of the silt. If something swims or crawls along that disturbs one of the antennae, the worm springs up out of the ground and grabs whatever passerby happened to be unlucky that day. They’re found throughout the warmer parts of the Indian, Pacific, and Atlantic Oceans.