Duplicating fish is possible with a waterlogged block

The bug

If you right-click (with shift) onto a waterlogged block (e.g. a trapdoor) with a fish bucket, the fish bucket won't be cleared, but the fish will still be spawned.

To reproduce

1. Place any waterloggable block

2. Place water in it

3. Switch into Survival mode (if you haven't already)

4. Right-click onto that waterlogged block with a fish bucket (you can also right-click onto the side of an adjacent, non-waterloggable block)

Previous description (original edited)

If we have a fish in a bucket, when we press Shift (in some cases it is unnecessary) and click on the waterlogged block, then a fish will appear in it, but we will still have the "Fish Bucket" item.
This allows for the simple and rapid production masses of food. The specific variant of the fish is also remembered for this glich.
The fish appears depending on the block, on it or in it, for example the trapdoor will appear in it and in the case of the chest, on it.
Glitch does not work with a ladder.