This is the legend
Moving island
Actually it is a huge mammal
He fell asleep
Sleeped for hundreds of years
Because it floats on the water for a long time
Covered with sand on its back
Finally became an island
in the middle place - that water place
Is the stomata he breathes
So every few days you will see the fountain
這是傳說中
移動的島嶼
其實它是一隻龐大的哺乳動物
他睡著了
睡了數百年
因為長期飄浮在水面上
在它的背上積滿了砂土
最後成了一座島
中間積水的那地方
是他呼吸的氣孔
所以每隔數日會看到噴泉
thanks for your description @cloudblade