"Katra" wrote in message
...

But what I am wondering is, if the mesh is fine enough, how can they
remove the fish thru the net?

## It wasn't showing a heron removing a fish through a net. I didn't see
the heron get a fish in the film quip.

We have a very large local fish hatchery that used to have some problems
with Herons. When I drive by there now, there is rarely a heron in site
anymore.

All they use are pond nets as far as I can see.

The fry ponds are simply enclosed by a greenhouse so are indoors. Only
the growout ponds are netted.

## Because crisscrossed wires and sprayers don't work for long with herons.
They're totally useless where other fish predators are concerned. What may
work is having a dog who will remain near the ponds and will bark at and
chase birds. Not all dogs do. But again, dogs are useless against some
fish predators. I know. I have 3 dogs.

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