Takumi and the children helped the merfolk and were generously rewarded. They head to a small island to finally master water magic, but then they encounter a strange monster.
They're rocks that we occasionally 
find in the shellfish we eat.
‫إنها صخور نجدها أحيانًا
‫في المحار الذي نأكله.
Nur ein Stein, der manchmal
in Muscheln ist, die wir essen.
Son rocas que encontramos
en los moluscos que comemos.
Son rocas que encontramos
en los moluscos que comemos.
Oui, ce sont les pierres
qui sortent des huîtres.
Sono pietre che a volte troviamo
nelle conchiglie che mangiamo.
São rochas que às vezes encontramos
nas ostras que comemos...
Мы находим эти камешки в моллюсках.