During the Dreamtime Baayami (Spirit Father) and his two wives were travelling. The two wives went for a swim in a spring, not knowing that Garriya, the crocodile was following them. Garriya was in love with the two women and wanted their spirits. He swallowed both women and swam down the Narran River where he hide from Baayami. Baayami tracked Garriya to where he was hiding in a lake and speared him at Weetalibah water crossing. It is said that as Garriya was dying a shower of rain fell and a rainbow appeared. The colours of the rainbow were trapped in the scales of the dying crocodile, which is how Opal came to be.