Cecil wrote:
We love cats and own a cat.....an INDOOR cat. Our neighbors (two
different neighbors) own more than one cat and they stay outdoors
all night and most of the day (the cats, not the neighbors). Problem
is, one cat loves to fish. She's the only cat I've caught in the act,
so I'm blaming her for all the torture that has befallen on our koi and
goldfish.

If anyone has any ideas as to how to keep these sweeties away
from our precious fish, please advise. We have tried speaking
to the neighbors. What a laugh!

Are you really so opposed to putting up a fence?

I'm more of a cat person than a fish person, really, but it's
unacceptable for one person's pet to be eating another person's pet.
You may want to try laying out a trap for the cat.