Suvannamaccha (Thai: สุพรรณมัจฉา; rtgs: Suphanna Matcha; Khmer: សុវណ្ណមច្ឆា; Sovann Maccha, from Sanskrit: सुवर्णमत्स्य; suvarṇamatsya "golden fish") is a daughter of Tosakanth appearing in the Thai and other Southeast Asian versions of Ramayana. She is a mermaid princess who tries to spoil Hanuman's plans to build a bridge to Lanka but falls in love with him instead.
The figure of Suvannamaccha is popular in Thai folklore and is represented on small cloth streamers or framed pictures that are hung as luck-bringing charms in shops and houses throughout Thailand.
Hanuman, building a causeway, discovered that he was hampered by mermaids underwater. When Sita is kidnapped, her husband Rama enlists Hanuman's aid in rescuing her.
Hanuman learns that Sita is being held captive on the island of Lanka. He informs Rama, her husband, who orders him to build a causeway to Sri Lanka from India so Rama's army can attack. Hanuman collects his band of Vanaras and they begin throwing huge boulders into the sea to make a foundation for the causeway.
After a few days they notice something is wrong and call Hanuman to report. They tell him that each day they throw rocks into the sea and the next day they are gone.
Hanuman asks for volunteers to join him while he instructs the others to continue throwing rocks into the sea. 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.