Tadpole

The tadpole (オタマシャクシ, Otamashakushi) is a fish (technically an amphibian) introduced in. It lives in ponds, sharing its spot with crawfish, killifish, and frogs. They sell for only 100 bells, making them the joint cheapest fish in the game (with the Jellyfish). It is unknown what species of frog the tadpoles are, but they are most likely the same species the frogs are.