Watch Dr. Slump and Arale-chan: Hoyoyo!! Follow the Rescued Shark… full episodes online English Sub.
Other titles: Dr. Slump Movie 08: Arale-chan Hoyoyo!! Tasuketa Same ni Tsurerarete…
Synopsis: Arale saves a baby shark at the beach and in gratitude the sharks invite she and her family to visit the Underwater Kingdom.
Language: English Sub
Aired: Mar 12, 1994
Genres: Comedy, Sci-Fi, Shounen
Sources: Myanimelist, Wikipedia