My own idea is that what the Germans are trying for is a mermaid, which they will then train to catch fish.
For your German does not encourage laziness in any living thing.

He likes to see his dogs work, and the German dog loves work; of that there can be no doubt.

The life of the English dog must be a misery to him.
Imagine a strong, active, and intelligent being, of exceptionally energetic temperament, condemned to spend twenty-four hours a day in absolute idleness! How would you like it yourself?
No wonder he feels misunderstood, yearns for the unattainable, and gets himself into trouble generally.
Now the German dog, on the other hand, has plenty to occupy his mind.

He is busy and important.

Watch him as he walks along harnessed to his milk cart.