First seen in Day 189.

Rou encounters 10 of them in the Labyrinth City Aquarium's 【Age of the Gods Dungeon】 made by the 【Demigod of Spring Water】.

White frogs with bodies as big as a large dog and with the tail and fins of a fish that look like it grew wings.

The dungeon strengthened the monsters by 2 levels, making them very tough.