From ARR to Endwalker, here's how to unlock every optional dungeon in Final Fantasy XIV. Once obtained ... you can also purchase it from another player at the Market Board. Released in patch ...

Still, as PC Gamer reports, in general, the price of the hippo in FF14 is up compared to other minions. If you don’t want to buy a Hippo Calf pet, you can grind the level 84 Endwalker expansion ...