Mumei and the others are thrilled with a sudden pool day. However, their joy turns to horror when shadowy figures appear in the water. Sharks with plans of world domination? How can this be? With no possible escape, how will Mumei and the others cheat their way out of this new challenging test?
We, the shark clan, will bring all living 
creatures on the surface under our reign!
سنحكم نحن عشيرة القرش كافة مخلوقات السطح
sondern sämtliche Lebewesen der Erde von uns,
der Hai-Rasse, verknechtet werden!
El clan tiburón acabará
con todas las criaturas de la superficie.
El clan tiburón acabará
con todas las criaturas de la superficie.
mais toutes les créatures
de cette terre
Noi, il clan degli squali, regneremo 
su tutte le creature di questo pianeta!
mas todas as criaturas que
 vivem no planeta Terra...