Piscine Wyverns are mostly aquatic wyverns, or wyverns who act more like serpents and leviathans. They retain similar anatomy to a Flying Wyvern, but have the mannerisms of a fish or snake. The Piscine Wyverns in Monster Hunter 4 Ultimate are all sandswimming Piscine Wyverns. Plesioth makes a cameo in this game but cannot actually be fought. Instead, it can be fished up through the Palico Casting Machine, where its parts can be harvested.