This is a snailien from the planet Sodiumbo. Alex E. is a scout for the snailien species. He was sent into space in search of salty planets so the Sodiumbolings can conquer the galaxy. Alex E. finds Earth to be deliciously salty, and lucky for us he’s greedy. He doesn’t plan to return to Sodiumbo because he wants to live out the rest of his days eating the salt from our planet. The reason it’s “lucky” to toss salt over your left shoulder is because if Alex E. is sneaking up behind you he’d much rather eat the salt than devour you.