Parvati: Devi Parvati known as a consort lord Shiva. She is considered source of all universal principle of power , energy or creativity. She is the belived to be the daughter of the Himalayas. She is the mother of Ganesha and Kartikeya. When shown with Lord Shiva, shows the abhaya mudra (hand gesture of fearlessness, [...]

When the right palm is placed over the back of left palm, both palm being in Ardhachandra hasta. Lets take a look at the viniyoga shloka etasya viniyogastu sammatau matsyadarshane It says that this gesture is used to denote a Fish. The Matsya Avatara of Lord Vishnu is also denoted by this gesture.