What animal is the symbol of the 20th Tirthankara Munisuvrata?

The animal that symbolizes the 20th Tirthankara Munisuvrata is the tortoise. Jain images commonly place this emblem beneath Munisuvrata’s seated or standing meditative figure, allowing worshippers to distinguish him from other Tirthankaras.

Munisuvrata is the twentieth Tirthankara of the present half-cycle of Jain cosmology, known as avasarpiṇī. Jain tradition identifies him as the successor of Mallinatha and the predecessor of Naminatha. His emblem is part of a larger system in which each of the 24 Tirthankaras has a distinctive lanchhana, or identifying sign.

Traditional accounts say Munisuvrata was born at Rajgir to King Sumitra and Queen Padmavati of the Harivamsa dynasty. Jain texts also place the events of the Jain Ramayana, including the age of Rama, in his era. He is said to have lived for 30,000 years and attained liberation at Sammed Shikhar.

The tortoise should not be confused with an attendant deity’s vehicle or with the animal symbols of other Tirthankaras. In this question, it is specifically Munisuvrata’s personal emblem.