Doraemon

Nobita is jealous of Suneo's carp pond so Doraemon gives him some magic food which when fish eat it, they can swim through air like it is water and they are tame. Suneo is jealous of Nobita's flying fish so steals the food and gets his sea captain uncle to use it on fish out at sea. A box arrives for Suneo and when opened is full of deep sea flying fish monsters.