I know there are people with ponds on here so here's a puzzler for you.
My garden pond is around 10ft by 8ft by 3ft deep all round, no shallow areas. I have a mix of Ghost Koi, Goldfish, Tench, Gudgeon and Rudd.
Recently the Rudd have all disappeared!
Given that they are shyer by nature and much faster swimmers than the other fish; and given the depth of the pond I don't believe it could be a Heron attack.
Nothing else is missing, just the Rudd, some of which were a good size! There were 8 or 10 of them, 3 originals the rest bred in the pond. No floating bodies and none on the bottom.
Any thoughts as to what has happened to them?