Who you calling corrugated, huh?
These mostly aquatic frogs are called Corrugated Water Frogs because of their wrinkly skin. But this isn't evident in all individuals. This one looks quite smooth. Note the eyes that are nearly on top of the head, to better see you with when the frog is floating in the water.
''Lankanectes corrugatus'' is a species of frog in the Nyctibatrachidae family. It was once monotypic within the genus ''Lankanectes'', until the second species - ''Lankanectes pera'' was described in 2018 from Knuckles Mountain Range. It is endemic to Sri Lanka.
''Lankanectes corrugatus'' is an aquatic frog species inhabiting slow-moving rivers in marshy areas. It is a common species. Threats to it are agrochemical pollution and wetland reclamation for housing and vegetable farms.