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As per these versions of Ramayana, during one of the battles with Ravana's army, Hanuman encounters one powerful opponent, who looked like vanara from waist-up but had tail of a fish. After a fierce battle, as Hanuman was about to hit the creature with his weapons, a golden star shining in the sky above, reveals by way of aakashwani that the enemy, whom he is going to harm is his own son born by his union with Suvannamaccha, the mermaid daughter of Ravana. Hanuman, immediately holds his weapons in mid-air and father-son duo recognize each other.
Another version of story tells, while following Maiyarab in order to find Rama and Laxmana, who have been abducted by Maiyarab and taken to his kingdom in netherworld, Hanuman reaches a pond, where he encounters Macchanu. The fight between them is indecisive, therefore, Hanuman is surprised and asks his opponent, who is he. Macchanu introduces, himself as son of Hanuman and Suvannamaccha and so they finally identify and embrace each other. He tells Hanuman that Maiyarab, is his foster father, who had picked him up lying on sea shore, where his mother had left her. Although, he does not want to betray Maiyarab but tells Hanuman through a riddle the entrance to the netherworld lies inside the lotus in the pond he was guarding.
- Suvannamaccha- the mother of Macchanu.
- Makardhwaja - the son of Hanuman, as per Indian version of Ramayana, where Hanuman is a celibate.
- The Ramayana and the Malay shadow-play by Amin Sweeney, Vālmīki. Penerbit Universiti Kebangsaan Malaysia,. 1972. pp. 238, 246, 440.
- Satya sudhā, a critical evaluation of Dr. Satya Vrat Shastri's creative works by Satya Vrat Varma. Eastern Book Linkers. 1991. pp. 190, 205, 214.
- Śrīrāmakīrtimahākāvyam: Thāirāmakathāmāśritya praṇītamabhinavaṃ Saṃskr̥tamahākāvyam by Satyavrat Sastri. Mūlāmala Sacadeva Pratiṣṭhānam. 1990. pp. xvi,224, 282.