Maa Siddhidatri is definitely the ninth avatar of maa Durga which is worshipped around the ninth working day of navratri. Ma Siddhidatri is represented with four arms sitting down on a gorgeous lotus flower. Ganga took care in the seed, when Parvati herself took on The form of water, knowing https://www.youtube.com/watch?v=S1HpMpEww4Q