noun
black-spotted pond frog
A species of frog (Rana nigromaculata) native to East Asia. The name literally means 'lord frog'.
田んぼでとのさまがえるを見つけた。
I found a black-spotted pond frog in the rice paddy.
Compound of 殿様 (tonosama, 'lord') + 蛙 (kaeru, 'frog'), from the frog's dignified appearance.