Fishlegs first performs a lullaby for Meatlug in the Dragons: Riders of Berk episode "In Dragons We Trust". He admits that he and Meatlug have a bedtime routine involving singing lullabies and Meatlug licking his feet. He only sings one line in this episode, in an attempt to calm her when the dragons have to spend the night in the Arena.
Sleep, little Meatlug in your bed, where yummy little boulders dance in your head.
- This song seems to be based on the folk lullaby Hush, Little Baby