And, as the years go by, they are taking over cities - human refuse being easier to come by than live fish.

Like eating a live fish that happens to be very hot.

As we talk, a farmer from another village comes to beg the right to take away a few live fish - he wants to breed them in his fields.

You can see whole adult live fish with all their internal organs.

Now it has set its sights on reeling in an altogether more slippery passenger: live fish.