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I have six plastic goldfish spawning tanks up under the eve of the fish house. The tops are about 3 feet off the ground. The water surface is covered in water hyacinth. Every day, I was checking the hyacinth for eggs and doing a water exchange. Nothing was happening, so I pulled them down to check the fish again last week. Three-fourths were missing! Could only have been the night heron. I'm in the process of putting up netting, but would not have thought to net those tanks. Vietnamese pot-belly bore.
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