As Goma-chan is swimming in the river, a shark's silhouette appears behind him?! The shark turns out to be Dot-chan, a young whale shark that escaped from the local aquarium! Goma-chan and Dot-chan quickly become great friends and have fun swimming in Dot-chan's tank at the aquarium together. But when Ashibe-kun calls out to Goma-chan that it's time to go home, Goma-chan doesn't seem to understand him... What's happened to Goma-chan?
Since we're here, let's check 
out the other fish and stuff.
بما أنّنا هنا، لنتفقّد الأسماك الأخرى وما شابه
Wenn wir schon mal hier sind, sollten wir
uns auch die anderen Fische anschauen.
Ya que vinimos, veamos el resto de peces.
Ya que estamos aquí,
veamos el resto de peces.
Puisqu’on est là,
allons voir les autres poissons.
Visto che siamo qui,
diamo un'occhiata anche agli altri pesci.
Já que viemos aqui,
vamos ver outros peixes!
Раз уж мы в океанариуме,
 давайте всё тут посмотрим.