Ananthapura Lake Temple is a Hindu temple built in the middle of a lake in the little village of Ananthapura, Kasaragod District of Kerala, South India, at around 6 km from Kumble. This is the only lake temple in Kerala and is believed to be the original seat (Moolasthanam) of Ananthapadmanabha Swami (Padmanabhaswamy temple) Thiruvananthapuram. Legend has it that this is the original site where Ananthapadmanabha settled down.

The temple also has yet another interesting tale to tell – the story of the guardian crocodile. From very ancient times, one crocodile has been seen there. Though devotees used to take bath in the tank there is no instance of it harming anyone. Babia is the name by which this guardian is known to the world. It is the local guardian and the messenger of the temple. The only food that Babia takes is the offerings of the devotees. Usually it is a special gruel made of rice and molasses. After the worship, the feed offered by devotees is given to Babia at noon. Temple authorities claim that Babia is a vegetarian and has never harmed anyone including the fishes in the pond.

source: https://en.wikipedia.org/wiki/Ananthapura_Lake_Temple