Some frogs "bypass the tadpole stage"

Carrying out his fatherly duty, a male Oreophryne frog in Papua, New Guinea, guards his clutch and two newly hatched froglets that rest atop the egg mass. Like many of the Microhylidae family, these frogs bypass the tadpole stage, developing fully within the egg. Male frogs embrace their clutch each night to keep the eggs moist and protect them from predators such as insects.

From National Geographic.   You learn something every day.