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?
Starting today, the surface will 
belong to us, the shark clan!
ابتداءً من اليوم، سيكون السطح لنا نحن، عشيرة القرش
Ab heute gehört die Welt uns, der Hai-Rasse!
A partir de hoy,
la superficie será del clan tiburón.
A partir de hoy,
la superficie será del clan tiburón.
À partir de maintenant,
la surface nous appartient !
Da oggi, ogni centimetro di terraferma
 appartiene al clan degli squali!
A partir de hoje, todos da superfície
 pertencem ao clã dos tubarões!