While reading about (legendary) creature called [Mermaid](https://en.wikipedia.org/wiki/Mermaid), I stumbled upon 1 of the examples [SuvarnaMaccha](https://en.wikipedia.org/wiki/Suvannamaccha).

[![enter image description here][1]][1]

While building Ramasetu, this daughter of Raavana was an obstacle, but later fell in (mutual) love with Hanuman and had an offspring, [Macchanu](https://en.wikipedia.org/wiki/Macchanu).

This story predominantly appears in Combodian, Thai and some other versions of Ramayana:

> When several volunteers have stepped forward Hanuman leads them into
> the waves. They find a large number of mermaids underwater. As they
> watch, a new rock is tossed in. The mermaids living underwater take
> the rocks and carry them away. Hanuman looks for their leader. He
> spots lovely mermaid supervising the others. He swims towards her but
> she skillfully evades him. Time and again he begins an attack but it
> comes to nothing.
> 
> Hanuman finds he is falling in love with the creature. He changes his
> tactics and begins to silently woo her. She responds to him and soon
> they are together at the bottom of the sea.
> 
> Later, Hanuman asks the mermaid why she is stealing the rocks. She
> tells him that she is Suvannamaccha, a daughter of Ravana (the demon
> who had abducted Sita). When Ravana saw Hanuman's Vanaras building a
> causeway he instructed Suvannamaccha to stop it.
> 
> Hanuman tells the mermaid why he is building the causeway. He tells
> her of the abduction of Sita, the battle between Rama and her father
> Ravana, how they started to build a bridge, and in consequence was
> ordered to finish the causeway within seven days or pay with his life.
> 
> Suvannamaccha turned to Hanuman and her eyes were filled with love. No
> more, she said, would she prevent Hanuman from completing his mission.
> Her mermaids underwater would, in fact, return all the stolen rocks to
> the causeway.
> 
> They parted as lovers part but it was not to be the end for them.
> Hanuman had left a seed with Suvannamaccha and soon she would give
> birth to their son, Macchanu.

  [1]: https://i.sstatic.net/QvZmj.jpg

Is this really true?  
Do other versions of Ramayanas also recognize Hanuman as *Akhanda Brahmachari*?