From Creatures Wikia
This agent will inject a tadpole vendor into your world. When activated the vendor will dispense a batch of slimy frog eggs. If they are in the water, they will hatch into tadpoles that will swim around. Eventually the tadpoles will mature into male and female frogs. The males will hunt and eat the immature tadpoles and the females will lay more eggs before they die. Both the tadpoles and the adult frogs are edible. The frogs make excellent treats for Draconian norns and any other carnivorous breed.
Download at Creatures Caves.