Sea Princesses Season 2 Episode 25 The Guilty / The Number Crunchers

The sea princesses and Marcello are busy cooking pearl drops for a school picnic. They leave the drops unattended to look for Hugo. When they return however, all the drops are gone. Who could have taken them? / Miss Marla chooses Polvina, Ester and Marcello to represent the class in a Maths challenge. Tubarina is outraged, and is determined that Marcello will have to forfeit his place for her.