Nunna is a small blue fish with one big eye and one small eye and yellow lips. She wanted to know why the sea is salty and the crab said it is just like that, which is not an answer. So she swam all the way down to the sand at the bottom and found an old pot sitting there, still making salt. Nobody ever told it to stop.
She told the pot it can stop now and it said okay. It did not stop. That is why the sea is still salty and now at least she knows.