Hippo Hop (2016)

Under the hot sun of Anran, a sweating hippo mother walked into the cooling water of the river. Her little hippo kid wanted to do the same, but he found out soon enough that he was too small to walk like his mother. At the bottom of the river he caught the attention of one little fish, and then another fish, and then two fish. Together they thought up a solution...

Unfortunately the movie Hippo Hop is not yet available on HBO Max.