31.   Then the big fish came up to the surface.

32.   They were playing hockey after setting up some ice-fishing paraphernalia over fish holes that they never really intended for fish to come through.

33.   Typically, the fish are caught using large nets placed near the mouths of rivers where the fish come back to spawn.

34.   Where do all these big fish come from?

35.   Authorities said the spate of cases in such a short period of time was unusual and suspect the fish may come from one catch.

36.   Bigger fish survive better, so more fish come back to the river.

37.   Consumers are afraid of contamination, even though the fish come from outside the polluted area.

38.   Mr Tsang said officials were investigating whether the fish involved in the recent cases came from one catch.

39.   The fish came, and so did the divers.

40.   They allow marine biologists to distinguish hatchery salmon from wild ones and even tell what hatchery the fish came from, like a cattle brand.