The Mahabali frog or purple frog (Nasikabatrachus sahyadrensis) is one of the rare frog species of the Western Ghats. It is named after the mythological king Mahabali.
It is dark purple to greyish in colour. It is also called pignose frog. It is as old as the dinosaurs.
It comes out of its burrow for breeding only one day in a year. Its body is bloated which looks jelly like. Its head is very small in proportion to the body.
It is listed as endangered in the red list of the International Union for Conservation of Nature (IUCN). It can be declared as the official amphibian of Kerala.