Guppies

It is a real puzzle that guppies (small freshwater fish) are thriving in a spring along the new Park Connector Network in Sungei Punggol. The ground water was flowing out into the river. Since it is quite high up and there are concrete drains further down stream I wonder how the little critter managed to swim so far up and form a colony right at the starting point.

Come to think of it, it is interesting to see a spring. Water keeps flowing out of "nowhere".