Each of the 4 lullabies (3 songs and the sound of waves) corresponds to a soothing choreography lasting 3 to 5 minutes. The fish dance to the rhythm of the lullaby. At the end of the musical choreography, the fish disappear and only the "starfish" night light remains lit for another 30 minutes (night light mode) before switching off automatically. If the child makes a noise and when the sound detector is activated, a silent choreography automatically restarts. The starfish switches on for another 30 minutes of reassuring night light.