Mizoujacks are two-legged frog-like creatures in the 6th Layer. They are quiet animals that live in groups near geothermals.
Their eggs are round and spiral-shaped, and the shells are incredibly strong. In Lyza's notes she said freshly laid eggs are good, but when Riko, Reg, and Nanachi came across their nest the eggs were already beginning to hatch. Despite this they took and cooked them anyway. Even after being boiled and fried the hatchlings were still moving, though they were dead. They ended up being quite tasty.