The black spotted side folded frog is a species of amphibian in the family Ranidae, also known as the spiny male toothed frog or black frog. Head length is greater than head width; The snout is slightly pointed, the snout tip is blunt and round, protruding from the lower lip, the nostrils are in the middle of the kissing eye, and the distance between the noses is equal to the width of the eyelids; The eyes are large and prominent, with a narrow distance between them, smaller than the distance between the nose and the width of the upper eyelid; Short forelimbs, with forearm and hand lengths less than half of body length; The skin on the back is relatively rough, with obvious folds on the back side, and multiple longitudinal ridges of varying lengths between the folds. There are round warts and mole particles on the back, perianal area, and lower back of the thigh; Smooth belly surface. The back of the body has a variety of colors, including light green, yellow green, dark green, gray brown, etc., mixed with many black horizontal stripes of different sizes.

The black spotted side folded frog is a species of amphibian in the family Ranidae, also known as the spiny male toothed frog or black frog. Head length is greater than head width; The snout is slightly pointed, the snout tip is blunt and round, protruding from the lower lip, the nostrils are in the middle of the kissing eye, and the distance between the noses is equal to the width of the eyelids; The eyes are large and prominent, with a narrow distance between them, smaller than the distance between the nose and the width of the upper eyelid; Short forelimbs, with forearm and hand lengths less than half of body length; The skin on the back is relatively rough, with obvious folds on the back side, and multiple longitudinal ridges of varying lengths between the folds. There are round warts and mole particles on the back, perianal area, and lower back of the thigh; Smooth belly surface. The back of the body has a variety of colors, including light green, yellow green, dark green, gray brown, etc., mixed with many black horizontal stripes of different sizes.

The Japanese wrinkled frog is a true frog native to Japan, introduced to Hawaii in the late 19th century. It is sometimes considered a single species, similar to the Imienpo station frog found on the East Asian continent. The difference between these two species and others lies in their rough and uneven skin. It lives and reproduces in various freshwater environments, including ponds, streams, and wetlands. The International Union for Conservation of Nature does not consider this species to face any significant threats.

The Japanese wrinkled frog is a true frog native to Japan, introduced to Hawaii in the late 19th century. It is sometimes considered a single species, similar to the Imienpo station frog found on the East Asian continent. The difference between these two species and others lies in their rough and uneven skin. It lives and reproduces in various freshwater environments, including ponds, streams, and wetlands. The International Union for Conservation of Nature does not consider this species to face any significant threats.