Baby Tooth; Slobber Slug

S1, E4: When Baby Shark gets his first loose tooth, he enlists William's help to lose it as fast as possible, so he can trade it in for a sand dollar. But when their antics get the tooth lost for real, they must team up with the Toothfish Fairy to track it down and make Baby's sand dollar dreams come true; Baby Shark and his friends are playing rockball when Hank's pet rock, Rocky, is accidentally sent soaring into the lair of the Slobber Slug, a vicious creature. They stage an elaborate rescue mission for Rocky, which ultimately fails. Forced to face their problems head on, they discover that the Slobber Slug is a friendly creature.